Seafood mixture:
3 king crab legs
1 tablespoon butter
12 ounces scallops
12 ounces shrimp, peeled, deveined, tails removed
salt
freshly ground white pepper

Béchamel:
6 tablespoons butter
2 teaspoons chopped garlic
6 tablespoons flour
4 cups milk
1 ounce (½ cup) grated parmesan cheese
salt
freshly ground white pepper

Cheese mixture:
10 oz frozen spinach, thawed and squeezed of excess water
15 ounces part-skim ricotta cheese
1 egg
1 ounce (½ cup) grated parmesan cheese
salt
freshly ground white pepper
8 ounces grated Mozzarella cheese

8 ounces lasagna noodles, cooked and drained