Quick Onion Tomato Rasam is a tangy and flavorful South Indian soup made with onions, tomatoes, and a blend of spices. This comforting dish is perfect for a light meal or as a soothing remedy for cold and cough. The rasam is made by saut茅ing onions and tomatoes, adding tamarind pulp, rasam powder, and other spices, and simmering it until the flavors meld together. It is typically served hot with steamed rice or enjoyed as a soup on its own.