How do you reheat and crust stays crispy?

To reheat food while keeping the crust crispy, use an oven or an air fryer instead of a microwave. Preheat the oven to around 375°F (190°C) and place the food on a baking sheet; this will help restore the crispiness. Heat for about 10-15 minutes, checking occasionally to avoid overcooking. For air fryers, set it to 350°F (175°C) and heat for about 5-10 minutes for optimal results.