Chop onion and mushroom stems and saute in margarine. Shake in garlic powder. Remove from heat and stir in bread crumbs and grated cheese. Stuff mushrooms and bake in greased casserole dish or baking pan. Bake uncovered at 350 for 15 to 20 minutes.
Recipe from Newport Hospital's Book of Favorite Recipes, compiled by hospital staff and friends. More about Newport Hospital