My years of testing air fryers (and I've used close to 20) have taught me that there are plenty out there that can give you crispy- enough results—but the very best air fryers churn out not only golden brown french fries and crispy-skinned chicken wings , but tender fillets of salmon and even whole roast chickens at the touch of a button. Don’t let the term air fryer confuse you: These gadgets are just small convection ovens that use fans to circulate hot air around your food in order to cook it evenly and efficiently. They can take many forms; the robot-esque basket-style models are probably what come to mind when you think of an air fryer, but there are versatile countertop convection ovens that add bake, broil, toast, and slow-cook options to the air fryer functionality. Some even dehydrate and steam too.…