My Ma's tasty biryani

This is a very tasty biryani do try it.....

Ingredients:
1. 3 cup basmati rice(Searves 7)
2. 1 1/2 kg chicken 
3. 3 onion
4. 2tbsp of crushed garlic paste
5. 2tbsp of ginger paste
6. 1 teaspoon white corriander crushed
7. 1 1/2 tbsp cumin powder
8. 1 tbsp red chilli powder
9. 1/2 kg yogurt
10. 1/2 kg potatoes
11. 4-5 green chillis 
12. 6-8 black pepper
13. 1 teaspoon mace
14. 4 clove
15. 3 cardamom(green)
16. 1 stick cinamon
17. 3-4 star anise
18. 3 tomatoes
Method:
First of all brown the onion in 1 1/2 cup oil. Mix all the ingreadients in the same oil including chicken. Keep for 30 minutes to marinate in the dish. Than boil the water and add rice with salt(2-3tbsp big). Cook till half doen and than drain the rice water.After that add the rice in that gravy. Add 2 teaspoon yellow cooking colour. Finally leave it to cook on a very low flame for 30minutes.
Serve hot.