01 -
Preheat the oven to 180°C (350°F). Grease a 23 x 33 cm (9 x 13-inch) baking dish and set it aside.
02 -
Melt the butter in a saucepan over medium heat. Add the flour and cook for one minute. Slowly whisk in the milk and stir continuously until the sauce thickens. Add parmesan cheese and salt, then remove from heat.
03 -
In a bowl, mix together ricotta cheese, shredded mozzarella, whisked egg, dried parsley, and salt until combined. Set aside.
04 -
Heat olive oil in a skillet over medium heat. Add the seafood mix, salt, pepper, and dried parsley, and sauté for 3 minutes.
05 -
Spread a thin layer of bechamel sauce on the bottom of the baking dish. Place a layer of lasagna sheets over the sauce. Spread 1/3 of the cheese filling over the sheets, followed by 1/3 of the seafood mixture and 1/3 of the bechamel sauce. Repeat the layers twice, finishing with grated mozzarella and parmesan cheese on top.
06 -
Bake the lasagna for 35 minutes. If the top browns too quickly, cover with foil and continue baking until the cheese is melted and bubbling.
07 -
Remove the lasagna from the oven and let it cool for several minutes before slicing and serving.