Add cinnamon, cloves, pepper, cumin & coriander seeds in a preheat pan.
Roast them all together and transfer to a grinder.
Add ginger, garlic, coriander leaves and spring onion to the grinder.
Dry roast green chilies in a pan and transfer to the grinder.
Now add red wine vinegar, sugar, and nice amount of chopped coriander leaves along with a touch of water and grind to a paste. This the cafreal masala.
Flavour the chicken tangdi with cafreal masala
Cover it and put in the freezer for 20 minutes.
Drizzle oil in a preheat pan and add onions and fry them well.
Transfer it to a platter. Add oil in the pan again and place the marinated chicken legs in it.
Cover the pan and cook it away for 7- 10 minutes.
Add the fried onion back to the pan and mix it well. Add a couple of dollops of butter and stir.