New England Seafood Casserole Recipe: The Best Recipe!

5 from 12 votes

A deliciously easy and hearty dinner

Prep Time10

Cook Time30

Total Time40

Course: Dinner

Cuisine: American

Diet: Gluten Free

Servings: People

Calories: 238kcal

5 cloves Garlic
3 tablespoon Butter unsalted
2 Cups Milk 2%, you can use whole or cream if you wish
12 Sea Scallops
1 Ib Shrimp
3 Filet Flounder
1 Cup Crackers I used a gluten free Ritz and it is 1 cup crushed
1 Shallot
¼ Cup Dry Sherry
5 tablespoon Flour I use King Arthur Gluten Free Measure for Measure flour but any 1:1 or regular flour is fine
8 oz Mushrooms
1 tablespoon Dijon
¼ cup Parmesan optional
¼ cup Fresh Parsley
Salt to taste
Pepper to taste

Set your oven to 400°F
Place Oil or unsalted butter into a pot: if you are using butter, use 1-2 tablespoon and place the chopped shallot into the pot until they are golden brown. Then mince the garlic and place in the pot for 2-3 minutes. Proceed to then add the mushrooms and allow them to brown for 4 or 5 minutes.
Add the Sherry: and allow it to boil down. Once it has, add the mustard and flour.
Once you have added the flour: Make sure the flour covers everything in the pot. It is going to thicken the sauce.
Add the milk: Add the milk to the pot and let it sit for 3-4 minutes. You can stir it in this time. It will begin to thicken.
Add the seafood: Add the seafood to the pot and allow it to cook for a few minutes. The shrimp will start to turn pink, and the filets of fish will begin to break down. Season your dish and taste it here. Add as much salt or pepper as you like.
Pour into your baking dish: Pour the filling into your baking dish and then top it with the cracker. For this, melt 1-2 tablespoons of butter and mix it with the cracker crumbs. If you want, you can add the parmesan at this point, or, once it comes out of the oven.
Bake: Place your baking dish into a preheated oven and bake for 25-30 minutes at 400°F. When it comes out of the oven, allow it to sit for 5-10 minutes. Cover with parmesan (if you didn’t put it on while it was going into the oven), and fresh parsley.