Preheat the air fryer to 390°F (200°C) for 3–5 minutes. A hot basket helps the cheese crisp up quickly.
Prep the halloumi. Pat the block dry with paper towels to remove excess brine.
Slice into 1/3- to 1/2-inch slabs or thick batons. Thinner slices get crispier; thicker pieces stay chewier.
Lightly oil. Toss or brush the slices with 1–2 teaspoons of oil. This boosts browning and helps prevent sticking.
Season simply. Add black pepper.
Skip extra salt—halloumi is already salty. Sprinkle optional chili flakes or dried oregano if you like.
Arrange in the basket. Place pieces in a single layer with a little space between them. Don’t crowd; work in batches if needed.
Air fry for 6–8 minutes total. Cook for 3–4 minutes, flip, then cook another 3–4 minutes.
You’re looking for deep golden edges and light blistering.
Finish and serve. Squeeze lemon over the hot halloumi. For a sweet-spicy edge, drizzle with honey or hot honey and add a pinch of chili flakes. Serve immediately.