This dish is made with a mixture of lentil and rice flour. Most Indian shops sell this mixture as "Ondhwa mix". This dish was very popular among Gujaratis who lived in East Africa. It's usually served as a snack with tea and chutney. In my opinion, it is a meal on its own as it has all the lentils and rice plus the vegetables and yoghurt. It's dish which can be served hot or cold at any time. It's great for picnics.
The flour used in this recipe is called "Ondhwa flour" and available in most Indian grocers. It's made from a mixture of lentils such as Urad dall, chana dall, tuverdall and rice flour . This mixture can also be made at home by mixing these ingredients and then soaking them overnight in water and then blending them finely) Years ago, housewives in East Africa used to have to spend a lot of time preparing their lentils and flours at home. At the end of the month, housewives used to soak up their left over lentils and rice and blend them with yogurt and cooked a kind of a bread ( similar to sour dough bread) which later got very popular because of its taste.