Lemon Rasam is a tangy and refreshing South Indian soup made with lemon juice, tamarind, and a blend of spices. It is light, flavorful, and perfect for a hot summer day. The recipe involves boiling tamarind extract with tomatoes, turmeric powder, rasam powder, and other spices. The rasam is then tempered with mustard seeds, cumin seeds, curry leaves, and dried red chilies. Just before serving, lemon juice is added to give it a zesty kick. Lemon rasam can be enjoyed as a soup or served with steamed rice and papadum.