Dab chicken dry and mix in a bowl with Tandoori paste. Cover and chill overnight.
The next day peel and finely dice the onions. Wash the tomatoes, grate them dry, quarter and seed them. Cut the flesh into cubes of about 1 cm. Heat the oil in a pan, fry the chicken in the oil for about 8 minutes each while turning it, remove.
Sauté onion in frying fat for about 3 minutes. Add rice and mix well. Stir in tomatoes and sultanas. Pour rice into a large ovenproof casserole dish (approx. 2.5 litres capacity).
Place the chicken on the rice and pour broth over it. Cover the casserole dish with foil and cook in the preheated oven (electric cooker: 225 °C/ convection oven: 200 °C/ gas: see manufacturer) for approx. 45 minutes. Remove from the oven, cover and leave to rest for approx. 10 minutes.
Wash coriander, shake dry and pluck leaves from the stems. Garnish curry with coriander. Natural yoghurt tastes good with it.