Dosa/Idli batter is a traditional South Indian batter made from a combination of rice and urad dal (black gram lentils). The ingredients are soaked, ground, and fermented to create a smooth and slightly tangy batter that is used to make delicious dosas and fluffy idlis. This versatile batter can be easily prepared at home or purchased pre-made in stores. It is a staple in South Indian cuisine and is enjoyed as a healthy and nutritious breakfast or snack option.