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    Home » Recipes » Pasta recipes

    Seafood-stuffed pasta shells - in a creamy cheese sauce

    Published: May 25, 2020 · Modified: Jun 30, 2024 by VJ · This post may contain affiliate links · Leave a Comment

    Jump to recipe

    Seafood stuffed pasta is made from jumbo pasta shells stuffed with juicy prawns, tender calamari and plump mussels, and oven-baked in a creamy cheese sauce. You'd think that a dish this good should be reserved for a special occasion, but these seafood-stuffed pasta shells are so easy to make I'm sure they'll make a regular appearance at your dinner table!

    A plate of seafood stuffed pasta shells covered in cheese sauce.
    Jump to:
    • Cheesy seafood stuffed pasta shells
    • What you will need
    • What to do
    • Seafood pasta FAQ
    • Save for later
    • Related recipes
    • 📋The recipe

    Cheesy seafood stuffed pasta shells

    If you enjoy pasta and seafood then I think you are going to love this dish of seafood-stuffed pasta shells with a cheesy sauce. Jumbo pasta shells are stuffed with shellfish, garlic, onions and mushrooms and covered with a creamy cheesy sauce before being baked in the oven. This dish is simple enough for a quick and easy family supper, but sophisticated enough for an elegant dinner party.

    The beauty of this dish is that you can put it together in advance, and leave it in the fridge until you are ready to pop it in the oven. Then pop it into the oven to bake it for 20 minutes until the cheesy topping is bubbling and golden.

    All this dish needs by way of sides, is a simple tomato salad and a slice of garlic bread to mop up the delicious cheesy sauce.

    A spoonful of seafood stuffed pasta shells being lifted from the baking dish.

    What you will need

    Equipment

    Nothing special - just 2 saucepans, a large one for cooking the pasta and a smaller one for making the cheese sauce. You will also need a large frying pan with a lid to cook the seafood stuffing.

    For baking the dish in the oven you will need a casserole dish large enough to hold your pasta and seafood bake.

    Ingredients

    **You can find the complete list of ingredients and full instructions for making this seafood-stuffed pasta recipe on the printable recipe card at the end of this post**

    The quantities given are for 4 people as a main meal. If you want to serve the seafood stuffed pasta as a starter you should halve the ingredients.

    Ingredients for seafood stuffed pasta shells.

    Prawns - I like to use frozen raw prawns that have been deveined and shelled. You can use unshelled prawns, but you will have to devein and remove the shells yourself.

    Mixed seafood - this is a mixture of frozen ready-cooked clams, mussels and calamari rings.

    Pasta shells - these are large (jumbo) pasta shells, sometimes called conchiglioni. Their large size makes them ideal for holding all the delicious seafood and sauce. You will need approximately 80 grams of dried pasta shells per person.

    Tip - cook more pasta than you think you will need. You may find that some of the shells break on cooking, making them impossible to fill.

    Mushrooms - you can use white or chestnut mushrooms depending on your own taste.

    Onions - white or yellow onions are best for this dish.

    Garlic - you can either use fresh garlic that you mince yourself or, for convenience, use ready-crushed garlic from a jar.

    Olive oil - this is used for frying the onions and garlic.

    For the cheese sauce you will need:

    • Butter
    • Flour
    • Milk
    • Grated cheese
    • Salt and pepper

    What to do

    Preparation

    Defrost the seafood. You can either leave it in the fridge to defrost or if you are in a hurry, place the unopened packets in a sink of warm water. They won't take long at all to defrost like this. Cut the shrimp in half or thirds, depending on the size (this will make it easier to fit it into the pasta shells).

    Cook the pasta according to the instructions on the packet, then drain into a colander and rinse under cold water to stop the cooking process. Leave in the colander to drain.

    While the pasta is cooking, chop the onions and mushrooms into approximately half-inch pieces. If you are using fresh garlic, peel it and mince finely.

    Make the filling

    Onions and mushrooms softening in a frying pan.

    Heat the oil in a large frying pan and fry the mushrooms, garlic and onions until the onions start to turn translucent. Do this over low heat so as not to brown the onions.

    The onions do not have to be completely cooked, they will continue cooking once the dish is in the oven.

    Onions and mushrooms in a frying pan with prawns and mixed seafood.

    Add the prawns to the onions and continue to stir until the prawns have turned pink. This will only take a few minutes.

    Stir in the mixed seafood.

    Set the pan aside to cool.

    Make the sauce

    Melted butter in a saucepan.

    Melt the butter in a small saucepan.

    Butter and flour combined in a saucepan.

    Remove the saucepan from the heat and stir in the flour. Mix well to remove any lumps.

    A spoonful of cheese sauce held above a pan.

    Return the pan to the heat and pour in the milk. Continue to cook over medium heat until the sauce thickens.

    Season with salt and black pepper to taste.
    Add the grated cheese and stir until the cheese melts.

    Assemble and bake

    Pasta shells in a dish with seafood.

    Fill each shell with a spoonful of the cooled seafood/onion mixture and arrange them in an ovenproof baking dish.

    Spread any remaining seafood mixture over the top.

    Grated cheese on top of an unbaked dish of seafood stuffed pasta shells.

    Pour the cheese sauce over the pasta and seafood, ensuring that everything is well covered. Sprinkle grated cheese over the top.

    A dish of seafood stuffed pasta shells covered with a topping of golden brown melted cheese.

    Bake in a preheated oven (180C / 375F) for about 20 minutes until the cheese is melted and golden and the seafood pasta shells are piping hot.

    Serve immediately with a fresh tomato salad and slices of garlic bread.

    Seafood stuffed pasta shells on a white plate alongside a knife and fork.

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    Seafood pasta FAQ

    Can I freeze this dish?

    Because the dish is made with defrosted frozen seafood it is not advisable to re-freeze this dish.
    However, you can assemble this dish no longer than one day in advance, and store it, covered, in the fridge until you are ready to bake it.

    Are there any variations?

    I sometimes add a handful of frozen peas along with the mixed seafood. Peas and seafood go so well together, and the peas also add a nice splash of colour.

    For a crispier topping sprinkle with Panko breadcrumbs before adding the grated cheese.

    Why doesn't my sauce thicken?

    If your sauce does not thicken (maybe you had either too much milk or not enough flour), make a slurry with a teaspoon of cornflour (cornstarch) and a tablespoon of cold water and stir it into the sauce over a gentle heat until the sauce thickens.
    Bear in mind that the sauce will thicken further when you add the cheese.

    Save for later

    If you would like to try these cheesy seafood-stuffed pasta shells, why not pin this recipe to one of your Pinterest boards so you can find it easily? Just click the image below.

    Alternatively, you can save the recipe by clicking on the floating heart icon on the right-hand side of the screen.

    Related recipes

    Visit my fish and seafood recipes page for other tasty seafood dishes. Here are a few you might enjoy:

    • A dish of mussels covered in creamy garlic and onion sauce.
      Fresh mussels in a creamy garlic sauce
    • Irish Seafood Chowder in a creamy sauce
    • Overhead shot of a dish of cod mornay on a plate with vegetables.
      Cod Mornay with prawns
    • Prawn and broccoli pasta with red pepper sauce

    📋The recipe

    A plate of seafood stuffed pasta shells covered in cheese sauce.

    Seafood stuffed pasta shells in a creamy cheesy sauce

    Seafood stuffed pasta is made from jumbo pasta shells stuffed with juicy prawns, tender calamari and plump mussels and oven-baked in a creamy cheese sauce. You'd think that a dish this good should be reserved for a special occasion, but it's so easy to make I'm sure it's going to make a regular appearance at your dinner table!
    Recipe by: Veronica
    Main Course
    British, Italian inspired
    Calories 754
    Prep 40 minutes minutes
    Cook 20 minutes minutes
    Total Time 1 hour hour
    Servings: 4 people
    Print Pin Comment Bookmark Saved!
    Prevent your screen from going dark
    5 from 1 vote

    (Click the stars to rate this recipe)

    Equipment

    • Sharp Knife
    • Chopping Board
    • Large saucepan for pasta
    • Small saucepan for cheese sauce
    • Wok or large frying pan
    • Spatula
    • 9" x 11" Baking dish (23cm)

    Ingredients

    • 12 ounces / 320 grams jumbo-sized pasta shells (allow extra for breakage)
    • 8 ounces / 250 grams frozen raw prawns (shrimp)
    • 8 ounces / 250 grams frozen cooked mixed seafood (seafood cocktail)
    • 1½ cups / 150 grams mushrooms chopped into 1cm pieces
    • 2 medium onions chopped into 1cm pieces
    • 2 cloves garlic crushed / minced
    • 1 tablespoon olive oil for frying the mushrooms and onions

    Cheese sauce

    • 2 ounces / 60 grams butter
    • 2 tablespoons / 30 grams flour
    • 2 cups milk
    • 1 cup grated cheddar cheese for the sauce
    • ¼ cup grated cheddar cheese for sprinkling on top
    • Salt and ground black pepper to taste

    Instructions

    • Boil the pasta in a large pan of salted boiling water, according to the instructions on the packet.
      12 ounces / 320 grams jumbo-sized pasta shells
    • Drain the cooked pasta through a colander and then rinse under cold running water to stop the cooking process. Leave to drain in the colander until needed.
    • Chop the mushrooms and onions into 1cm dice and peel and mince the garlic. Fry gently in 1 tablespoon olive oil until the onions are translucent and the mushrooms have started to soften.
      1½ cups / 150 grams mushrooms, 2 medium onions, 2 cloves garlic, 1 tablespoon olive oil
    • Chop the defrosted prawns into 2 or 3 pieces, depending on the size, then add to the mushrooms and onions and fry gently until the shrimp is completely pink - approximately 5 minutes.
      8 ounces / 250 grams frozen raw prawns (shrimp)
    • Add the defrosted seafood mix and stir through to combine.
      8 ounces / 250 grams frozen cooked mixed seafood (seafood cocktail)
    • Carefully spoon 1 to 2 tablespoons of the seafood mixture into each of the cooked pasta shells and arrange open side up in a baking dish.
      Scatter any remaining seafood mixture over the top.

    Cheese sauce

    • Set the oven to 180°C / 375°F
    • Melt the butter in a saucepan, then remove from the heat and mix in the flour until there are no lumps
      2 ounces / 60 grams butter, 2 tablespoons / 30 grams flour
    • Return to the heat and add the milk. Stir continuously until the mixture comes to the boil and thickens.
      2 cups milk
    • Add the grated cheese and stir until melted.
      1 cup grated cheddar cheese
    • Season with salt (optional) and plenty of freshly ground black pepper
      Salt and ground black pepper to taste
    • Pour the sauce over the pasta shells in the baking dish, taking care to cover completely.
    • Sprinkle with the remaining grated cheese
      ¼ cup grated cheddar cheese
    • Bake in a preheated oven for 20 minutes until the cheese is melted and golden.
    • Serve with a fresh tomato salad and slices of garlic bread.

    Notes

    Do not freeze this dish as it has been made with defrosted frozen seafood, which should not be refrozen.
    You can prepare this dish up to one day in advance, but store covered in the refrigerator until you are ready to make it.
    Garlic - if you don't have fresh garlic cloves you can substitute with garlic from a jar.
     Cheese - I like to use a mixture of grated cheddar and mozarella, but you can use your own favourite cheese.
    For a crispier topping, sprinkle breadcrumbs on top of the cheese sauce before covering with grated cheese.

    Nutrition

    Calories - 754kcal | Carbohydrates - 64g | Protein - 49.2g | Fat - 33.8g | Saturated Fat - 17.8g | Cholesterol - 333mg | Sodium - 1262mg | Potassium - 574mg | Fiber - 1.9g | Sugar - 8.7g | Vitamin D - 148µg | Calcium - 519mg | Iron - 10mg

    I am not a nutritionist. The nutrition information has been calculated using an on-line calculator, and is intended for information and guidance purposes only. If the nutrition information is important to you, you should consider calculating it yourself, using your preferred tool.

    Unless otherwise stated, a cup is the standard US cup containing 240 ml. In all my recipes this cup is assumed to hold 140g of flour. For help converting other ingredients between cups, grams, ounces and other measures, see my recipe conversion calculator.
    All my recipes are developed and tested at sea-level. For tips on adjusting recipes for high altitudes see my post on baking at high altitudes.
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    About VJ

    Before I started my food blog I was an IT Consultant. Now that I've swapped an office for a kitchen I have a lot more time to spend on things that interest me such as trying out new recipes. Most of my cooking is based around quick and easy meals, mostly made from scratch, using everyday pantry ingredients.

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