Savita's Notes: Addition of sugar is totally optional. I insert sugar at-final following tasting the curry. This is often my private liking. 1 teaspoon sugar isn't going to make curry sweet but adds Yet another dimension to tamarind flavor. Cashew nut paste is applied in conjunction with tomato puree http://johnnygzqgu.tinyblogging.com/The-Ultimate-Guide-To-Tomato-Egg-Curry-Recipe-33353963