Rinse mushrooms and remove stems. Place upside down in a baking dish and layer with sauce, seasonings, mozzarella, and pepperonis. Feel free to add your favourite toppings!
Drizzle with olive oil on top of pizzas and gently move around the dish to coat the bottoms of the mushrooms
Bake for 5 minutes
Broil on high for 5 minutes (careful not to burn) to crisp up toppings
Top with fresh parsley or more Italian seasoning and enjoy!
Notes
Store in the refrigerator for 3-4 days. Reheat by broiling in the oven on high for 5 minutes, or 1 minute in the microwave.
Freeze in an airtight container for 3 months. Thaw overnight and heat in a preheated oven the same way you made them.