Coat chicken leg and thigh pieces with mustard oil, salt, ginger paste, garlic paste, plain yogurt, biryani masala, and red chili Mix well and set aside to marinate for 30 minutes Drizzle cooking oil in a large pot and add thinly sliced onion Fry the onions until golden brown then remove from heat Cut potatoes in half and add to the pot along with salt, turmeric, and red chili powder Fry the potatoes for 2 minutes and remove them from heat Stir in cloves, cardamoms, cinnamon sticks, sliced onions, and marinated chicken pieces Fry for 3 minutes Pour hot water over and toss the potatoes back in the pot 1Add kewra water, and mix in biryani masala 1Cover with lid and cook for 20 minutes on low heat.