If you have leftover mashed potatoes, turn them into delicious mashed potato balls in your air fryer. Mix the mashed potatoes with shredded cheese, chopped green onions, cooked bacon bits, and your favorite seasonings. Shape the mixture into balls and place them in the air fryer. Cook at 400°F for about 10-15 minutes, or until the mashed potato balls are crispy and golden brown. These mashed potato balls make a tasty appetizer or a fun side dish.