1. Take oil in a thick-bottomed pan and add half of the chopped onion. Stir fry until the onion turns golden brown.
2. Once the onion is fried completely (golden brown), remove it from oil and keep it aside on a plate. Add sugar and biryani masala to it and prepare a dry mixture.
3. Clean and wash chicken chunks well and drain the water completely.
4. Now, add ginger-garlic paste (30 gm), turmeric powder, red chilli powder, garam masala powder, 1 tsp oil, chicken masala powder (1 tsp), coriander powder (1 tsp), salt, and curd to the chicken.
5. Mix all the ingredients very well with the chicken.
6. Cover and set it aside for 30 to 40 minutes.
7. Heat refined oil in a large, heavy-based deep pan over medium flame.
8. Once the oil turns hot, then reduce the flame slightly.
9. At first, fry the potato until it turns golden brown. Keep it aside.
10. Add cardamom, cloves, green chilli, bay leaf, cinnamon, and black pepper in oil, and sauté for 1 minute.
11. Add onion and roast until the onion turns golden brown.
12. Add ginger-garlic paste and fry on a low flame.
13. Add chili powder, salt, and sauté.
14. Add green chilli and chicken masala to it.
15. Add the marinated chicken and cook it on a low flame.
16. Add potato, the required amount of water, and cover the pan with a plate, cook it well.
17. Add garam masala powder and cook it for another 4-5 minutes and keep aside.
18. Take a utensil and boil water with black pepper and salt.
19. Wash foxtail millet rice, add it to boiling water and boil until 3/4th is done.
20. Drain excess water and set aside.
21. Take a thick-bottomed utensil and add some oil to it. Put layers of boiled millet rice, then add biryani masala onion mixture, coriander leaf, and mint leaf to it and lastly put a layer of chicken curry in it. (Follow this process twice or thrice, which depends on your layer size).
22. Again, keep the utensil on a low flame, cover the utensil with a plate and cook until the millet rice is cooked well.
23. After completion of cooking, serve with raita.