To Layer on Dum: Take a big and deep pan to layer the biryani. Put 2-3 tbsp. Desi Ghee or clarified butter at the bottom. Put a few pieces of chicken first.Then,top this layer of chicken with one layer of rice. Now Sprinkle some fried onions .Now, put one layer of drops of kesar water. And one layer of Garam masala and kewra water mixed with 1/4th cup of water. Just spread a few drops of this water roughly. Now again repeat the chicken layer, then the rice layer, then again fried onions ,kesar water, and Garam masala kewra water.Now, put the final layer of rice and sprinkle some kesar water and top it with some fried onions.To put this on dum,place some dough on the edges of the patila/pan. Cover with the lip and keep this on a tawa and switch on the gas on low. Let this cook on dum for about 20 minutes or till you get the wonderful aroma of biryani and kesar.