AIR FRYER OPTION: Divide the mixture into 4 portions and spread on a piece of parchment paper cut to the size of the air fryer basket. Bake at 400ºF for 10 minutes. Then carefully remove the parchment paper from the basket, flip the patties over with a spatula, lower the parchment paper and buns back into the air fryer, and bake for another 4 minutes or until golden brown.