Grind the coriander and cumin in a pestle and mortar. Put the chicken in a bowl with the coriander and cumin, cloves and yoghurt, rubbing to make sure all the meat is coated. Cover and leave to marinate in the fridge for 30 minutes.
When the chicken has almost had long enough in the marinade, heat the olive oil in a sauté pan and add the onion to soften for 5 m