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In a sealable bag or bowl, combine the green beans, garlic, olive oil, salt, and pepper. Toss until the green beans are evenly coated.

Arrange the green beans in a single layer on the air fryer tray. If necessary, work in batches to avoid overcrowding.

Set the air fryer to bake at 400 degrees Fahrenheit and roast the green beans for 6-7 minutes. Shake the basket or toss the green beans halfway through the cooking process to ensure even cooking.

Once the green beans are cooked to your desired texture, remove them from the air fryer.

Drizzle the lemon juice over the green beans and sprinkle with lemon zest and Parmesan cheese.

Serve hot and enjoy!