Boil corn niblets. Drain and remove excess water. This bhel can be made with hot or cold corn niblets.
In bowl, mix corn niblets, onion, tomato, potatoes, chaat masala, green chillies, green chutney, tamarind chutney, coriander leaves well.
Add lemon juice, salt and mix. Divide into individual servings, sprinkle sev and serve immediately.