Season chicken with salt and pepper.
Cook chicken in a cast-iron skillet with olive oil until fully cooked.
Toss cooked chicken with ¼ cup barbecue sauce.
Slice chicken into thin strips.
Brush naan or flatbread with barbecue sauce.
Add chicken, onions, and jalapeños (if using) on top.
Sprinkle mozzarella and cheddar cheeses evenly over toppings.
Bake on a pizza stone or baking sheet at 425°F (220°C) for 12–15 minutes.
Optional: Broil for 1–2 minutes for extra browning.
Garnish with fresh cilantro and serve hot.