
Gently combine all ingredients in a bowl.
Form into 4 patties, ½" thick. Using your thumb, create a small indent in the patties. Refrigerate 30 minutes
Preheat air fryer to 350°F.
Brush patties with barbecue sauce if using and place in a single layer in the air fryer basket. Cook 6 minutes. Flip over and cook an additional 6-8 minutes or until cooked through (165°F).
Serve on buns with desired toppings.