1 lb of clean shrimpJuice of 1 lemon4 tablespoons of olive oil2 medium chopped onions3 cloves of garlic, crushed3 teaspoons of tomato sauce4 tomatoes skinless and without seeds, chopped2 cubes of shrimp or seafood broth1/2 cup of hot water½ teaspoon of chopped parsley1 lb of lasagna pasta4 cups of thick grated mozzarella cheese1 cup of grated parmesan cheeseSalt (to taste)Pepper (to taste)Sauce2 tablespoons of butter1 tablespoon of flour2 cups of milk1 teaspoon of nutmegSalt (to taste)Pepper (to taste)