Roasted Rainbow Vegetables in the Air Fryer

Preheat an air fryer according to manufacturer's recommendations.

Place red bell pepper, summer squash, zucchini, mushrooms, and onion in a large bow. Add olive oil, salt, and black pepper and toss to combine.

Place vegetables in an even layer in the air fryer basket. Air-fry vegetables until roasted, about 20 minutes, stirring halfway through cooking time.