Prep the marinade: In a bowl, whisk olive oil, lemon juice, red wine vinegar, garlic, oregano, cumin (if using), salt, and pepper.
Marinate the chicken: Add the chicken pieces and toss to coat. Cover and chill for at least 30 minutes, ideally 2–4 hours.
Overnight is great for maximum flavor.
Soak wooden skewers: If using wooden skewers, soak them in water for 20–30 minutes to prevent burning.
Preheat the air fryer: Set to 400°F (200°C) for 3–5 minutes. A hot basket helps with browning.
Skewer (optional): Thread chicken onto skewers, alternating with onion pieces. If you’re not using skewers, just cook the pieces directly in the basket.
Arrange in the basket: Lightly oil the basket or use a perforated parchment liner.
Lay chicken in a single layer with a little space between pieces or skewers.
Air fry: Cook at 400°F (200°C) for 8–10 minutes, flip, then cook another 6–8 minutes. Chicken is done when edges are browned and the internal temperature hits 165°F (74°C).
Rest and garnish: Let the chicken rest 3 minutes. Sprinkle with chopped parsley and an extra squeeze of lemon.
Serve: Warm pita, tzatziki, sliced cucumber, tomatoes, and extra red onion make a perfect plate.
Add a simple Greek salad or lemony rice if you want a fuller meal.