Clean mushroom caps with a damp cloth or paper towel. Remove stems and chop finely. Saute onion in butter with a dash of olive oil until transparent and starting to brown. Add garlic, red pepper and chopped stems. Sprinkle with salt, pepper and Italian seasoning and cook until stems are done.
Combine cream cheese with cooked vegetables and stir until melted. Add grated cheddar. Place mushroom caps in a greased baking dish and fill with cream cheese mixture. Top with pepperoni pieces and sprinkle with bread crumbs and Parmesan. Bake at 400 for 20 minutes
Serve immediately. Makes 10
Notes
Mushrooms can be prepared up to 12 hours ahead and held in refrigerator until bakingVariation: Add more chopped pepperoni or cooked Italian sausage to the cream cheese vegetable mixture for a hardier mushroom