Make flavorful and cheesy potato and cheese stuffed mushrooms using a food processor and an air fryer. Start by cleaning and removing the stems from the mushrooms. In the food processor, combine cooked and mashed potatoes, shredded cheese, chopped parsley, minced garlic, salt, and pepper. Pulse until well combined. Stuff each mushroom cap with the potato and cheese mixture. Preheat the air fryer to 375°F and place the stuffed mushrooms in a single layer. Cook for about 10-12 minutes, or until the mushrooms are tender and the filling is golden brown. Serve hot as a tasty appetizer or side dish!