Heat oil in a kadai/pan and fry the whole jeera and then add the finely chopped onions and sauté for 3-4 minutes till translucent.
Add the boiled potatoes, salt, red chili powder, amchur powder.
On a low flame for 3-4 minutes stirring all the while so that the mixture does not stick to the bottom of the pan.
Now add the chopped coriander leaves and mix well. Turn off the gas and leave the mixture to cool.
In a small bowl add the flour/maida and water to make a smooth paste.
Place 2 tbsp of the mixture on one end of a spring roll sheet lengthwise leaving 2-3 ” from the edge, to form a roll about 3” long.
Now fold the edge to cover the potato mixture.
Fold both the left and right side of the sheet and roll the sheet like a bedding to form a roll
When you have reached the edge of the spring roll sheet, apply the flour and water paste on the edge to seal the roll. Deep fry in hot oil till golden brown and crisp.
Serve with ketchup/chutney.