Tomato charu is a South Indian dish made with tomatoes and spices. It is a tangy and flavorful soup-like dish that is typically served with rice or dosa. To make tomato charu, tomatoes are cooked with spices such as cumin, mustard seeds, curry leaves, and green chillies, along with lentils and tamarind paste for added flavor. It is a popular comfort food in South India and is often enjoyed during the rainy season.