Start by washing and trimming the green beans, removing any stems or damaged ends. Place them in a mixing bowl.
Spritz or drizzle the beans lightly with olive oil, ensuring they’re evenly coated. Toss gently with tongs or a spatula to distribute the oil and seasonings.
Add a pinch of salt and freshly ground black pepper to taste, then give everything a good toss again to evenly season.
Preheat your air fryer to 200°C (400°F) for about 3 minutes. Line the basket with parchment paper or lightly spray with non-stick spray to prevent sticking.
Spread the seasoned green beans in a single layer inside the air fryer basket, making sure not to overcrowd so they can crisp evenly.
Cook the green beans for 8-10 minutes, shaking the basket or tossing the beans halfway through to promote even browning and crispness.
Check the beans after 8 minutes; they should be blistered with golden brown spots and crispy on the edges. If needed, cook for another minute or two until they reach your preferred crunch.
Transfer the cooked green beans to a serving dish. If desired, sprinkle with freshly grated parmesan or lemon zest for extra flavor.
Serve immediately to enjoy their maximum crunch and fresh flavor. These green beans make a perfect snack or side dish, crispy and vibrant.