01 -
Preheat oven to 350°F (175°C).
02 -
In a large skillet, melt butter over medium heat. Add minced garlic and chopped onion. Sauté until onion is translucent, about 3 to 4 minutes.
03 -
Add flour to the skillet and cook, stirring constantly, for 1 minute.
04 -
Slowly whisk in milk and heavy cream. Continue stirring and cook until sauce thickens, about 5 to 6 minutes. Season with salt and black pepper.
05 -
Stir in chopped shrimp and crab meat. Simmer for 2 to 3 minutes, then remove skillet from heat.
06 -
In a separate bowl, combine ricotta cheese with egg. Mix until smooth.
07 -
Coat the bottom of a greased 9x13-inch baking dish with a thin layer of seafood sauce.
08 -
Arrange 3 lasagna noodles over the sauce. Spread half of the ricotta mixture evenly on top. Spoon over a portion of the seafood sauce, then sprinkle with mozzarella and Parmesan cheese.
09 -
Repeat the noodle, ricotta, seafood sauce, mozzarella, and Parmesan layering once more.
10 -
Place remaining noodles on top. Cover with the rest of the seafood sauce and finish with the remaining mozzarella and Parmesan cheese.
11 -
Cover the baking dish with foil and bake for 35 minutes.
12 -
Remove the foil and continue baking for an additional 10 minutes until the top is golden and bubbling.
13 -
Allow lasagna to rest for 10 minutes before slicing. Garnish with chopped fresh parsley if desired.