Heat the oven to 220.
Marinade chicken – Combine the marinade ingredients in a bowl with the chicken make sure each piece is coated. Marinate up to 24 hours in the fridge. Same process for aubergine.
Slice onion & tomatoes into 2cm rings.
Plave 1/2 and onion face down on the tray and stick your skewer into to form the base of your keebab
Start layering onion, chicken (or aubergine), tomato on top of each other, place 1/2 an orange on top so juices run into the dish. Pour over any left over marinade. Use a skewer to secure the layers.
Transfer to the oven and cook for 20 - 30 minutes until the chicken is tender.
Set aside to rest for 5 minutes before serving.