Using the air fryer to reheat food is one of the best ways to enjoy leftovers! The air fryer is the best way to reheat food for many reasons. It’s faster and more energy-efficient than using a conventional oven, which can take up to 30 minutes to heat food. Plus, it leaves your food with a perfect crunch that you just don’t get with other methods! Reheat chicken, french fries, lasagna, and more!