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Seafood Au Gratin

Total Time

Prep: 30 min. Bake: 15 min.


6 servings

Updated: Oct. 04, 2022
A seafood casserole is a ‘must’ for a bountiful buffet. My father was a fisherman, so we ate fish almost every day. Over the years, I’ve tasted many seafood dishes, but none better than this one. —Hazel McMullin, Amherst, Nova Scotia


  • 1 pound haddock or cod fillets, cut into six pieces
  • 1/2 pound sea scallops
  • 4 tablespoons butter, divided
  • 2 tablespoons all-purpose flour
  • 1/8 teaspoon pepper
  • 1 cup chicken broth
  • 1/2 cup 2% milk
  • 1/2 cup grated Parmesan cheese, divided
  • 1/2 cup shredded part-skim mozzarella cheese, divided
  • 1/2 cup shredded cheddar cheese, divided
  • 1-1/2 cups sliced fresh mushrooms
  • Minced chives, optional


  1. Preheat oven to 350°. Arrange fish and scallops in a greased 11x7-in. baking dish.
  2. In a small saucepan, melt 2 tablespoons butter. Stir in flour and pepper until smooth; gradually add broth and milk. Bring to a boil; cook and stir 2 minutes or until thickened. Stir in 1/4 cup of each cheese; set aside.
  3. In a small skillet, saute mushrooms in remaining butter until tender; stir into cheese sauce. Spoon over seafood. Sprinkle with remaining mozzarella, cheddar and Parmesan cheese. Cover and bake 15-20 minutes or until bubbly and fish flakes easily with a fork. If desired, top with chives to serve.

Nutrition Facts

1-1/2 cups: 281 calories, 15g fat (9g saturated fat), 100mg cholesterol, 541mg sodium, 6g carbohydrate (2g sugars, 0 fiber), 29g protein.

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