Heat 1/4 cup cooking oil in a saucepan and add all the whole spices. Add 2 onions chopped and fry till light golden, along with 4 green chilies (with slits) and chopped mint leaves. Add 1 tbsp ginger & garlic paste and fry 1 minute. To this add, 2 tomatoes chopped and cook till it is soft. Now add all the spice powders like 1/4 tsp turmeric, 1 tbsp red chili powder, 2 tsp coriander powder, and 1 tsp cumin powder. Cook on low flame for 5 minutes till aromatic and oil separate. Then add 1/2 cup yogurt, 1 tbsp kasoori methi, 1/4 tsp garam masala powder, and 1 cup fresh coriander leaves. Place the lid and cook for another 5 minutes. Add this biryani masala to the chicken tikka pieces, mix well and cook for another 5 minutes on low flame. Taste and adjust the seasoning (add water and salt if needed). Place a piece of foil on the surface of the gravy and keep a hot burning coal on it. Pour a tsp of ghee over the coal. Cover with an airtight lid to trap the smoke. Leave it covered for 15 to 20 minutes. Open the lid and discard the foil and coal piece.