Take a frying pan, heat butter and crackle cumin seeds in it then put some dry fenugreek leaves (Kasoori methi), black pepper powder and put chopped onions, ginger, green chilli and saute till pinkish in colour, add chopped tomatoes and saute more till tomatoes get cooked..add salt and cream then yogurt and cashew paste..pour 1/2 cup of water add spinach puriee and cook fo'10-15 minutes at slow flame till the rawness of spinach get removed