Wash and soak urad dal for at least 2 hours. Drain and place in a food processor. Process until dal becomes a fine paste adding just a tablespoon of water if necessary. Remove and place dal paste into a large bowl.
Add jalapeno pepper / green chili, ginger, curry leaves, cumin seeds, and salt. Mix well with a spatula until well combined.
Heat vegetable oil in a deep pan. Wet your hands. Place a rounded tablespoon of dal mixture on your palm. Shape into a disk about 3 inches (7.5cm) in diameter. Make a hole in the center with your finger.
Gently slide into hot oil and fry turning once, until golden brown. This should take about 3 minutes. Depending on the size of your pan, you may have to fry in 2 or 3 batches. Remove and drain in paper towels. Repeat until all dal mixture is used up.
Serve warm or at room temperature on its own or with coconut chutney.