In a pressure cooker cook potatoes untill 2 whistle.after that mash boil potatoes in a bowl add salt,turmeric powder,kasuri methi,graded ginger,and red chilli powder mix it very well

Now take a utensil heat 2 tablespoon of oil add mustard seeds cook it untill it crackle then add onion cook it untill it's become transparent.then add mixture of potatoes that we have prepared.keep in side

Now take other bowl pour gram flour to it add salt,baking soda and turmeric powder add water and make a smooth batter.

Now make small potato ball from the potato mixture and dip in gram flour batter and deep fry them on first high flame then low flame,fry untill their colour changes to golden