Cut chicken into bite sized pieces put in a zip lock bag and add marinade except sour cream. Put in refrigerator for an hour, then add sour cream put back in refrigerator for 30 minutes.

Put chicken on a baking pan bake for 30 minutes.

Add the tomato puree to a sauce pan add the cardamon, ginger,garlic,garam masala,cumin,turmeric, cayenne pepper, and salt simmer 7 minutes. Add butter and milk. Mix well, till smooth. Then add chicken coating everything. Top with cilantro for garnish.