Manathakkali Vathal (Black Nightshade/Wonder Berry) is a traditional South Indian sun-dried delicacy made from small Solanum nigrum berries soaked in yogurt/buttermilk and salt. These dark, crunchy berries are known for a rich, tangy, and slightly bitter flavor, acting as a popular savory addition to curries (Vathal Kuzhambu), rice, and rasam. [1, 2, 3, 4, 5]