Directions

1. Preheat oven to 400 degrees F (200 degrees C).
2. Place ground beef in a large, deep skillet. Cook over medium high heat until evenly brown. Drain, crumble and set aside.
3. In a medium saucepan over medium heat, melt the margarine and stir in the mushroom stems, green bell peppers, garlic, parsley and basil.
4. In a large bowl, mix the ground beef, mushroom stem mixture, dry bread crumbs, soft bread crumbs and Cheddar cheese.
5. Place the mushroom caps, upside down, on a large baking pan. Generously stuff each cap with the mixture.
6. Bake in the preheated oven 15 to 20 minutes, or until the filling is golden brown.