1. Preheat oven to 400°F (200°C).
2. On a baking sheet or a large cast-iron skillet, use the onion half as a base and position the skewer vertically like a spit. Skewer the chicken slices individually, rotating each one 90 degrees. Bake for 1.5 to 2 hours, until internal temperature reaches 165°F (75°C). Let cool for 10 minutes.
3. Carve off slices of chicken to fill a pita or your wrap. Great to enjoy hot or cold; on top of a salad, and leftovers for the next day’s school lunch.