Skip to content
Allquickyrecipes Search recipes

Dinner · Part 2 of 3: Instructions

Creamy Seafood Lasagna with Rich Alfredo Sauce Step-by-step instructions

A steaming slice of creamy seafood lasagna with visible layers of shrimp and crab in a white baking dish.
Prep
Cook
Total
Serves
8
Includes 10 min resting

Before you start

Before beginning the assembly, ensure the oven is preheated to 375°F (190°C) to allow for consistent cooking. Prepare the workspace by gathering all ingredients and measuring the sauces and cheeses.

If boiling the noodles, have a colander ready to drain them quickly, and pat them dry with a clean kitchen towel to prevent excess water from thinning the alfredo sauce during the baking process. Having everything organized will make the layering steps much smoother.

Ingredients at a glance (6)
  • 1 lb lasagna noodles, boiled until al dente
  • 1 lb shrimp, peeled and deveined
  • 8 oz crab meat, lump or claw
  • 3 cups alfredo sauce, store-bought or made ahead
  • 2 cups mozzarella cheese, shredded
  • 1/2 cup parmesan cheese, freshly grated

Instructions

Pasta and Seafood Preparation

  1. Prepare the pasta and seafood
    Boil the lasagna noodles in salted water until they are al dente. Drain the pasta thoroughly and set aside. Meanwhile, ensure the shrimp are cleaned, peeled, and deveined. If the shrimp are very large, cut them into bite-sized pieces to ensure they cook evenly within the layers of the lasagna.
    Look for Noodles should be flexible but firm to the touch.
    Tip Adding a drizzle of oil to the pasta water helps prevent the noodles from sticking together after they are drained.

The pasta should be cooked just to the point of being tender but still firm. The shrimp should be peeled and deveined, and the crab meat should be picked over to ensure no shells remain.

This foundational step ensures that all components are ready for the quick assembly process that follows.

Layering the Lasagna

  1. Assemble the lasagna
    Spread a thin layer of alfredo sauce on the bottom of the 9x13 inch baking dish. Arrange a layer of cooked noodles, followed by a portion of the shrimp, crab meat, and a generous amount of alfredo sauce. Sprinkle with a portion of the shredded mozzarella and parmesan cheese. Repeat these layers until all ingredients are used, finishing with a final layer of cheese.
    Look for Ensure the sauce covers the edges of the noodles to keep them moist while baking.
    Tip Press down lightly on each layer with a spatula to keep the lasagna compact.

Each layer should be uniform, with sauce covering the noodles to prevent them from drying out. The cheese should be evenly distributed across the surface of the seafood. By the final layer, the dish should look neatly stacked and filled to the edges of the baking pan, ready for the oven.

Baking to Perfection

  1. Bake until golden
    Preheat your oven to 375°F (190°C). Cover the baking dish with foil and bake for 25 minutes. Remove the foil and bake for an additional 15 to 20 minutes until the cheese is bubbling and golden brown. Ensure the shellfish reaches an internal temperature of 145°F (63°C). Let the lasagna rest for at least 10 minutes before slicing and serving.
    Look for The top should be golden brown and the sauce bubbling at the edges.
    Safe temperature 145°F (63°C) internal temperature (shellfish)
    Tip Allowing the dish to rest is essential for clean slices.

The lasagna should emerge from the oven with a bubbling, golden-brown top. The scent of melted cheese and sweet seafood will be prominent. A quick check with a thermometer confirms the seafood is cooked through, and the dish is now ready for its essential rest before serving.

Common mistakes

A common mistake is using noodles that are overcooked before assembly, which can lead to a mushy texture after baking; aim for very firm al-dente noodles. Another error is failing to dry the pasta, which adds too much water to the dish and results in a runny sauce.

Finally, neglecting the resting time after baking will make the lasagna difficult to serve, causing the layers to slide apart instead of presenting as a neat, beautiful slice.

How to tell it’s done

The lasagna is finished when the cheese is bubbling and has achieved a deep, golden-brown color on the surface. The internal temperature of the seafood must reach 145°F (63°C) to ensure it is cooked through.

A knife inserted into the center should meet little resistance, indicating the noodles are perfectly tender. Most importantly, allow the lasagna to rest for 10 minutes before slicing; this cooling period allows the sauce to set, ensuring that each slice holds its shape on the plate.

  • Shellfish: 145°F (63°C) in the thickest part

Coming up in Part 3: common questions

  • Can this lasagna be made with store-bought alfredo sauce?
  • What is the best way to prevent the lasagna from being watery?
  • Why is it necessary to let the lasagna rest after baking?

Also in Part 3: variations (Spicy Cajun Seafood, Spinach and Seafood), storage and make-ahead, and the printable recipe card.

Up next · Part 3 of 3

2 variations · storage & make-ahead · 3 answers · printable card

Tips, FAQ & printable recipe (Part 3)← Back to the ingredients (Part 1)