Rinse mushrooms and pat dry; remove stems. Chop stems.
Combine stems, sausage, garlic and chopped parsley in a medium skillet; cook until sausage is browned, stirring often. Drain pan drippings. Stir in cheese, mixing well.
Fill mushroom caps with sausage mixture. Place in a 13x9x2-inch baking dish.
Bake at 350° F. for 20 minutes. Garnish with pimiento and snipped parsley, if desired.
Servings: 24