Keep them out carefully. In a pan boil tomatoes,onion, ginger, garlic, green chili, cashew nuts,melon seeds,red chili and whole spices once tomatoes gets soft switch off the gas. Once the mixture gets cool discard all the whole spices and blend into smooth puree.
Now heat butter in a pan add turmeric powder, chilli powder and then add the puree to it ,stir and cook it for two minutes.
Mix curd and cream add to the mixture.