Air fryer: Add patties to the air fryer basket in a single layer and air fry for 5 minutes at 375ºF (190ºC), or until warmed through. Oven: Add patties to a baking sheet and bake for 5 minutes at 375ºF (190ºC), or until warmed through. Stovetop: Heat a skillet with a little bit of oil until hot. Add the patties and pan-fry for 2-3 minutes on each side, or until warmed through.