1 lb. mushrooms, washed and dried
2 (10 oz.) pkg. frozen spinach, thawed
4 tbsp. (1/2 stick) butter, melted
Garlic salt to taste
1 tsp. salt
1/4 c. onion, chopped
1 c. Cheddar cheese, freshly grated

Saute mushrooms in small amount of butter until brown. Combine the thawed spinach with the salt, onion and melted butter, and line a 10-inch casserole with the spinach mixture. Sprinkle one-half cup of the grated cheese over the spinach mixture. Arrange the mushrooms over top. Season with garlic salt and cover with the remaining cheese. Bake for 20 minutes at 350 degrees or until the cheese is melted and browned. This casserole may be prepared and refrigerated until it is to be baked. Makes six to eight servings.