Cut onions in small and deep fry the onions in oil. Until the onion in crispy golden color.
Wash the chicken pieces well.
Take bowl add chopped green chili, mint leaves, curd, lemon juice, turmeric powder, red chili powder, ginger-garlic, salt, biryani masla powder.
And add chicken pieces in bowl and mix well.
Add fried onions in bowl.
Add ½ tsp oil in bowl mix altogether.
Keep a side for 2 hours for perfect marination.