Preheat oven to 375℉.
Bring small pot of water to a boil with salt.
4 cups water, 1 teaspoon salt
Meanwhile prep the veggies by washing and chopping into small pieces, then transferring them to a large pot with butter over medium heat. Cook for 7-8 minutes until mostly soft, stirring often.
1 red or orange bell pepper, chopped , 1½ cups chopped carrots, ½ cup chopped celery, 2 ribs, ½ cup chopped onion, ¼ cup salted butter
Boil the lobster tail(s) for 3-4 minutes until they reach 140-145℉ (see note 1). Remove the lobster from the water and immediately put in the scallops and shrimp to cook for 3-4 minutes until pink.
9 oz lobster tail(s), raw
Cut each lobster tail down the center on the bottom to remove the meat in one large piece (see note 2). Cut the meat into bite sized cubes and set aside.
Remove scallops and shrimp from the water and KEEP THE WATER. This is now a lightly flavored seafood broth we need for the filling. (If you forget and drain the water, see note 3)
12 oz raw shrimp, tail off, deveined, 16 oz small scallops, raw
Add the flour and all seasonings to the cooked vegetables in the pan. Stir and cook over medium heat for 30 seconds to 1 minute until the flour is absorbed.
⅓ cup all purpose flour , ½ teaspoon salt, 1½ teaspoons garlic powder, 1 teaspoon onion powder, 1 teaspoon chicken bouillon , ¼ teaspoon ground pepper
Pour in the milk and seafood broth and stir constantly. Bring to a simmer and cook for 1-2 minutes until thickened.
1½ cups whole milk, 2 cups seafood broth from cooking shellfish
Add in chopped lobster tail, shrimp, and scallops.
Pour into a 9x13 inch baking dish and zest a lemon across the top if desired.