Watermelon rind dosa is a unique and delicious South Indian dish made from the discarded rind of watermelon. The rind is finely grated and mixed with rice flour, lentils, and spices to create a flavorful batter. The dosas are crispy on the outside and soft on the inside, with a subtle sweetness from the watermelon rind. This dish is not only a great way to reduce food waste but also a healthy and nutritious option for breakfast or snack.