Boil the potatoes, peel and mash roughly
Heat 2 tablespoons oil in a saucepan. Add the mustard seeds, and then the curry leaves
Add the remaining ingredients, except the potatoes, and fry for a couple of minutes
Turn off the heat and thoroughly mix in the potatoes
Shape into balls of the desired size
Mix the batter ingredients with approximately 3/4 cup water to mike a smooth, slightly runny mixture
Dip each potato ball of the mixture in the batter, ensuring an even coating, and deep fry in hot oil to a golden colour
Drain onto kitchen paper
Serve with red garlic chutney