Add frozen green beans to a medium-sized bowl and toss with olive oil, salt, and pepper.
Place green beans into the air fryer basket and cook 4 to 6 minutes or until desired tenderness is reached, stirring the beans halfway.
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NOTES: Each air fryer cooks a little differently, adjust cooking time if needed; Because the green beans are cooked frozen, they have a higher moisture content than fresh green beans. When air frying, the beans are essentially steamed, so they won't be as crispy or roasted as fresh green beans - they still turn out fantastic, though!
SERVING SUGGESTIONS: Add garnishes like your favorite nuts like sliced or slivered almonds, walnuts, or even candied pecans! Crumble feta, goat cheese, or blue cheese over top the green beans. Add to the top during the last minute in the air fryer to make it extra gooey and delicious.