Butternut Squash and Swiss Cheese Casserole

a squash and melted cheese casserole
Butternut Squash and Swiss Cheese Casserole


8 oz. fresh mushrooms or mushroom stems
2 onions, coarsely chopped (¼ cup)
1 ½ tsp. butter
1 Tbs. finely chopped parsley
¼ tsp. ground black pepper
1 cup 1% low-fat milk
2 Tbs. all-purpose flour
1 clove garlic, minced
¾ cup shredded Swiss cheese
⅛ tsp. nutmeg
1 (2.5 lb.) butternut squash, peeled, seeded, and cut into ⅛-inch slices

Finely chop mushrooms and onions and transfer to bowl together.
Melt butter in skillet over medium-high heat. Add chopped mushrooms and onions, and season with salt if desired. Cook 10 minutes, or until the onions are lightly browned, stirring occasionally. Stir in parsley and pepper.

Preheat oven to 350°F. Coat 9-inch deep-dish pie pan or gratin dish with cooking spray.

Bring milk, flour, and garlic to a simmer in saucepan over medium heat, whisking constantly. Cook 2 minutes, or until sauce is thick enough to coat back of spoon, whisking frequently. Whisk in 1/2 cup cheese and nutmeg, and season with salt and pepper, if desired.
Spread one-third squash in prepared pan. Top with 1/3 cup cheese sauce and half of mushroom mixture. Repeat layers, ending with cheese sauce. Sprinkle with remaining 1/4 cup cheese. Bake 45 minutes, or until squash is tender and top is browned. Let stand 10 minutes before serving.


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