Marinate chicken with curd, ginger garlic paste red chilli powder, kashmiri chilli powder, cumin powder, coriander powder for for 30 minutes.
Heat oil and Fry onion until brown, remove from oil and grind coarsely, keep aside.
In the same oil add garlic paste with 2 tbsp water and saute for 2-3 minutes on medium high flame.
Add curd and cook for 5-6 minutes or until Khoya (mawa) like consistency. This is the secret technique that Bhatiyara use for making Degi Korma.
Add ginger paste and cook for 2 minutes on low flame.
Now add whole spices and cook for 1 minute.
Add marinated chicken with 1 cup water and cook for 6-7 minutes stirring continuously on medium high flame.
Cover the chicken and cook on low flame for 15 minutes or until tender.
Add fried onions, garam masala powder and cardamom powder, mix well.
Cover and cook on low heat for 5 minutes. Turn off the flame.
Serve hot with Naan, Tandoori Roti, Khamiri Roti Paratha or Rice.