Mom's Best Recipes
Recipe

Seafood Lasagna

Creamy white-sauce lasagna layered with shrimp, crab, ricotta, mozzarella, and a lemony-herb finish.

Author By Matt Campbell
4.8
A golden baked seafood lasagna in a white ceramic baking dish on a light kitchen counter, with bubbling edges and chopped parsley on top
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Seafood lasagna is what happens when you want cozy carbs but also want dinner to feel like you did something a little fancy. Think: creamy garlic sauce, sweet shrimp, tender crab, and those browned, crispy corners that everybody mysteriously calls dibs on.

This version keeps the ingredients approachable and the steps low-drama. No mysterious seafood blends, no watery filling, no bland white sauce. We build a quick béchamel-style cream sauce, brighten it with lemon and herbs, then layer it like a normal lasagna. If you can stir a sauce and stack noodles, you have this.

Seafood lasagna ingredients arranged on a kitchen counter including shrimp, lump crab, ricotta, mozzarella, parmesan, lasagna noodles, lemon, garlic, butter, milk, and spinach

Why It Works

  • Balanced richness: A classic white sauce gives you that luxurious lasagna vibe, while lemon zest and parsley keep it from tasting heavy.
  • Seafood that stays tender: The shrimp get only a quick head start on the stove and finish in the oven, so they stay juicy instead of turning rubbery.
  • No watery layers: We drain and squeeze the spinach, we pat the crab dry if needed, and we keep the sauce thick enough to hold its shape once sliced.
  • Make-ahead friendly: Assemble earlier in the day (or freeze it) and bake when you are ready to eat.

Pairs Well With

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Storage Tips

Fridge: Cool completely, then cover the pan tightly or transfer slices to airtight containers. Refrigerate up to 3 to 4 days.

Reheat: For best texture, reheat in the oven at 350°F covered with foil until hot (about 20 to 30 minutes for a small baking dish, 10 to 15 for individual slices). Microwave works too, but the sauce can separate a bit. If it does, just stir the creamy bits back together on the plate.

Freeze baked: Wrap the pan (or slices) tightly in plastic wrap plus foil. Freeze up to 2 to 3 months for best quality. Thaw overnight in the fridge before reheating.

Freeze unbaked: Assemble in a freezer-safe dish, wrap tightly, and freeze up to 2 to 3 months. Thaw overnight, then bake as directed. If it is cold straight from the fridge, plan to add 10 to 15 minutes to the covered bake time so the center heats through without overbrowning the top.

Make ahead: You can assemble the lasagna, cover, and refrigerate up to 24 hours before baking. If baking from cold, add the extra time noted above and look for bubbling in the center.

Common Questions

Common Questions

Can I use imitation crab?

Yes. Real lump crab is best for sweetness and texture, but imitation crab works in a pinch. Chop it into bite-size pieces and fold it in gently near the end so it does not shred into strings.

Do I need no-boil lasagna noodles?

No. You can use either. No-boil noodles make assembly faster and they absorb sauce nicely. Just make sure the noodles are fully covered with sauce so you do not get dry edges. If you use regular noodles, boil to just shy of al dente, then cool and separate so they do not glue themselves together.

What seafood works besides shrimp and crab?

Scallops (cut into halves), chopped cooked lobster, or a mild white fish like cod can work. Avoid very oily fish because it can dominate the sauce.

How do I keep seafood lasagna from being watery?

Drain and squeeze the spinach until no liquid drips, keep the sauce thick enough to coat a spoon (like a loose gravy), and do not add liquid from thawed seafood. If your crab is pasteurized and packed in liquid, drain it well and gently pat it dry. Also let the lasagna rest 15 to 20 minutes before slicing so the layers set.

Can I make it without spinach?

Absolutely. Leave it out, or swap in sautéed mushrooms (cook them until the pan is dry) for a more savory, beach-house vibe.

I love seafood, but I also love food that shows up like a warm blanket. Lasagna is that blanket. The first time I tried a seafood version, it was delicious but honestly a little chaotic in the wrong way. The sauce was thin, the seafood got lost, and it ate like a casserole that could not commit.

This one commits. It is creamy but bright, rich but not sleepy. And it has my favorite kind of kitchen moment: you zest a lemon into the sauce, taste it, and everything suddenly wakes up. That is the point where you realize you are about to have a very good dinner.