Prosciutto-Stuffed Mushrooms:
Prepare as above, except omit butter, shredded cheese, and bacon. Cook mushroom stems, green onion, and garlic in 1/4 cup olive oil. Stir in bread crumbs, 1/3 cup chopped prosciutto, 1/4 cup shredded Parmesan or Asiago cheese, and 1 teaspoon dried Italian seasoning, crushed. Bake as directed.
Pesto-Stuffed Mushrooms:
Prepare as above, except discard mushroom stems. Omit green onion, garlic, butter, bread crumbs, cheese, and bacon. In a small bowl combine 1/2 cup purchased pesto, 1/4 cup shredded Parmesan cheese, and 1/4 cup toasted pine nuts. Spoon mixture into mushroom caps. Bake as directed.
