Authentic marination of chicken dum biryani yakhni

Name: Authentic marination of chicken dum biryani yakhni
Ingredients: 1 kg fresh chicken; 1 tablespoon vinegar; 1 onion barista; 1/2 cup oil (to fry onions & later will use this oil in cooking process); 1/2 cup yoghurt (little more can be added accordingly); 2-4 green chili’s; 1-1/2 teaspoon salt; 1 tablespoon ginger garlic paste; 1/2 teaspoon turmeric powder; 2 teaspoons red chilli powder; 1/2 teaspoon homemade Garam masala powder; 1 tablespoon kasuri methi; 2 pinch strands of saffron; 1/2 lemon juice; 1/2 bunch coriander leaves; 4-6 springs mint leaves