Preheat oven to 350°F. Spray a 9x9 inch casserole dish with nonstick cooking spray. Set aside.
In a large skillet over medium-high heat, heat the oil and 2 tablespoons of the butter. Sauté the sliced green onion until tender, then add the minced garlic and sauté another 15 seconds.
2 tablespoons canola oil, 2 green onions, 2 cloves garlic
Add the broth and clam juice, stir and bring to a boil.
½ cup low-sodium chicken broth, 8 ounces clam juice
Add scallops, shrimp, crab, and ¼ teaspoon pepper, and bring the mixture to a boil. Reduce the heat and simmer uncovered, for 5 minutes, or until the shrimp is pink and the scallops are firm and opaque all the way through. Stir the mixture gently while scallops are cooking.
12 ounces bay scallops, 1 pound small shrimp, 8 ounces crabmeat, ½ teaspoon freshly ground black pepper
Drain, reserving the liquid. Pour seafood mixture into a medium bowl and set it aside until ready to use.
In the same large skillet, melt the remaining ½ cup butter. Stir in the flour and whisk until smooth.
½ cup all-purpose flour
Combine 1½ cups half-and-half and the reserved cooking liquid, then gradually and while whisking, add the liquid to the flour mixture in the skillet. Add salt and the remaining ¼ teaspoon black pepper. Bring the mixture to a boil and cook, while stirring, for 2 minutes or until thickened.
2½ cups half-and-half
Remove the flour mixture from the heat and stir in the remaining 1 cup half-and-half, wine, salt, red pepper flakes, and ¼ cup shredded Parmesan cheese creating a white sauce.
¼ cup semi-dry white wine, ½ teaspoon kosher salt, ⅛ teaspoon crushed red pepper flakes, ½ cup freshly shredded Parmesan cheese
Stir ¾ cup of the white sauce into the seafood mixture.
Spread ½ cup of the white sauce in the prepared dish. Cover with uncooked lasagna noodles then spread with ¼ of the seafood mixture and ¼ of the white sauce. Sprinkle with ¼ shredded Italian cheese blend, ¼ mozzarella, and the grated Parmesan. Repeat three more times and top with white sauce and the different cheeses.
9 oven-ready lasagna noodles, 1 cup shredded Italian cheese blend, 1 cup shredded mozzarella cheese
Bake at 350°F for 40-45 minutes, or until golden brown. Allow the lasagna to set for 10-15 minutes before cutting.
Garnish with chopped fresh parsley if desired.