Sattu is prepared by dry roasting grains or grams, mainly barley or bengal gram. The traditional way of preparing Sattu involves the use of an iron vessel in which the grains or grams are roasted in sand. Afterwards they are sieved and then ground to a fine flour. The iron in sattu also keeps you feeling energised and gives a healthy glow to your face. Sattu is a low-glycaemic index food and is a great option for diabetics.