Cooked Rice Idli recipe with leftover rice with detailed step by step photos. These super-soft Cooked Rice Idlis are made with a combination of readymade rice rava and leftover cooked rice along with fluffy, wet-ground urad dal. It is easier to prepare this idli compared to the traditional one, as you need to soak wet-grind only the urad dal. It is also a relatively foolproof method that is sure to yield appetizingly white, bouncy soft idlis. However, since it makes use of cooked rice, it is not advisable to keep the fermented batter for more than a day or two.