Mix. Add the green beans, onion, salt, black pepper, and garlic powder to a large mixing bowl and gently toss until evenly coated.
Air Fry. Transfer the mixture to the air fryer basket and spread into an even layer. Air fry at 365°F for 8 minutes, shaking the basket halfway through.
Serve. Serve warm.
Notes
Sodium Control. Rinsing canned green beans removes much of the excess sodium from the packing liquid.
Bean Choice. Regular-cut green beans hold up better than French-cut when tossing and air frying.
Storage & Reheating. Store leftovers in an airtight container in the refrigerator for up to 4 to 5 days. Reheat in the microwave or in a skillet with a small amount of butter.