Preheat your air fryer to 200°C (390°F) and have it ready to go.
Trim the green beans, removing tough ends, then pat them thoroughly dry with a kitchen towel. This step helps them crisp better.
In a mixing bowl, toss the green beans with a tablespoon of olive oil, ensuring they’re evenly coated. This light coating promotes browning and crispness.
Add the salt, garlic powder, and paprika to the bowl. Toss again to distribute the seasonings evenly over all the beans.
Spread the seasoned green beans in a single layer in the air fryer basket, making sure they’re not overcrowded so hot air can circulate freely.
Cook the beans for 8-10 minutes, shaking the basket halfway through. You’ll hear crackling and see the edges turn golden brown as they crisp up.
Once crispy and browned to your liking, remove the green beans from the air fryer using tongs or a spatula.
Squeeze fresh lemon juice over the hot green beans for a bright, zesty finish that balances the smoky flavor.
Serve immediately for the best crunch, garnished with extra salt or lemon if desired. Enjoy this healthy, crispy snack or side dish!