Cut the potatoes in right Shape and size . First slice the potatoes and then cut Length wise
Wash potatoes under running water till they are clean.
Place in a bowl of iced water for 10-15 minutes
Heat oil in deep bottomed pan. Reduce the flame and allow it to acquire a lower temperature.
Now deep fry potatoes in batches. Keep flame low. This will make them crunchy and also help retain their color
Drain excess oil and on a absorbent paper. Allow to cool. Now sprinkle salt and pepper and toss well. Serve immediately with ketchup.