Mix besan, grated potato and oil in a bowl. Mix nicely together
Add salt, 1 tsp chaat masala, red chilli powder, hing, baking soda and lemon juice.
Mix nicely. Add very little water and knead to make a tight dough. Cover and keep the dough for 10 minutes.
Divide the dough in 4 parts. Fill one part in the sev press fitted with fine net.
Heat oil in a pan. Press the sev press over the hot oil.
Simmer the heat. Fry till golden brown from both the sides.