In the meantime, wrap each frank with a slice of bacon. Put them wrapped dogs in the steak basket and secure it. If you don't have a steak basket, just secure the bacon with toothpicks. Set aside while the veggies cook.
Put the vegetables in a pan with some butter and saute them until the bell pepper is nice and soft, stirring occasionally about 20 minutes. Set aside.
Put the dogs in the air fryer and set it for bacon, or 400 F 204 C, for 8 minutes.
When the bacon has crisped to your liking, remove the dogs from the air fryer and put the buns in on toast for a minute or so.
Put a frank in each bun and top with the warm vegetable mixture.
Serve with whatever condiments you like, ketchup, mustard, relish, etc.