Step 1: Preheat and prep the chicken: Set air fryer to 190°C (375°F) and preheat 3 minutes. Pat chicken dry with paper towels, then butterfly or gently pound to an even thickness so it cooks uniformly.
Step 2: Season: In a large bowl, mix olive oil, garlic powder, dried parsley, black pepper, and salt into a marinade. Add chicken and toss to coat every piece in a thin oil film — that film is what makes the outside golden and the inside juicy.
Step 3: Prep the veggies: Cut broccoli into small florets, rinse cherry tomatoes. Toss veggies with a little olive oil and black pepper. Keep pieces small and even so they cook through in the same time as the chicken without going mushy.
Step 4: Roast together in one basket: Lay chicken on the basket floor, scatter veggies and tomatoes in the gaps. Air fry at 190°C for 10–11 minutes. At minute 6, pull the basket out and shake once so veggies heat evenly — no flipping needed.
Step 5: Finish and squeeze lemon: Pull it when the chicken hits 74°C (165°F) at the thickest point. Squeeze fresh lemon over the top, rest 1 minute so the juices settle, then plate and eat.