In a deep bottomed pan / pressure cooker add oil. When its hot add the whole spices, (Cardamom, cinnamon and cloves).
Once the spices start spluttering, add Finely chopped onions, salt.
Then, after the onions has become slightly translucent add ginger garlic paste. Saute for few minutes and add tomato, Chilly.
The next step is to add mutton, saute for few minutes followed by spice powders (Coriander, pepper, red chilly)
Add water, when it comes to roaring boil, close with a lid a put the whistle on. Wait for 15 minutes till the meat cooks.
If you are open cooking, add extra 1 cup water and cook, lamb in a medium heat for 1 hour.
Once the meat is cooked add kusa to it, while the gravy is boiling.
Add garam masala at this stage and check for salt. Let it cook for about 10 minutes.
Once they are cooked add a dash of lemon and garnish with coriander leaves.
Serve them hot with chappati and Naan.