1. Preheat the air fryer to 400F.
2. Put the green beans in a medium bowl. Add the oil, salt, and pepper. Toss to coat.
3. Transfer beans to the basket of the air fryer, even if it isn’t done preheating.
4. Shake to arrange in a single layer as much as possible. Some overlap is fine.
5. Put air fryer basket into air fryer and allow to cook for 5 minutes. Test a green bean by poking a fork through it. It should enter easily. If so, they’re done. You can serve them or let them brown for another 2-4 minutes before serving.

*They will taste and crisp up better with 2 teaspoons but will be great with 1 teaspoon. Up to you!