Boil, peel and crumble the potatoes. Do not make it into a paste. Add rock salt, boiled sweet corn, cumin powder, pepper powder, chaat masala powder, crushed ginger and mix well.
Make a salad with finely chopped onions, tomatoes, cilantro leaves, salt, lemon juice and a pinch of sugar. Just mix everything and toss well.
keep green chutney, sweet chutney, chips if using and sev ready.
Take a taco shell. Slightly warm it if needed. First add some potato mixture. Then top with some green chutney. Then some salad. Next goes sweet chutney.Finally some sev and chips. You can alternate the layers and fill as you wish. Serve the filled taco shell immediately.