In a large mixing bowl, whisk together the yogurt, cumin powder, coriander powder, red chili powder, chaat masala, and salt to make the yogurt sauce.
Place the papdis on a serving plate and top each papdi with boiled potatoes and chickpeas.
Drizzle the yogurt sauce over the papdis, potatoes, and chickpeas.
Add a spoonful of tamarind chutney and mint-coriander chutney on top of each papdi.
Sprinkle some sev over the papdis and garnish with chopped cilantro leaves.
Serve immediately and enjoy your delicious Papdi Chaat!