For the stock, simmer 100 gm of chicken pieces along with following ingredients: 1 onion, 4-5 garlic cloves, 1 tsp cloves, 1 tsp coriander seeds, 1 tsp fennel seeds, 1 tsp black pepper corns and 20 gm of ginger pieces. Stir well and add 3 tbsp of Ghee and 1 tsp of black cumin with 2 tbsp of National Biryani Mix, on low flame for 2 hours, and strain it to get a clear stock.