Place the green beans in a large bowl and add in the olive oil, garlic, salt and black pepper. Toss everything together.
Transfer the green beans to an air fryer basket. Cook at 390 degrees Fahrenheit for 10 minutes, flipping halfway through.
Remove the green beans from the air fryer basket and serve.
Notes
Storage: Store leftovers in an airtight container in the fridge for up to 3 days.Reheat: You can reheat the green beans in your air fryer or microwave. But do not cook them to long, just long enough to be heated through.