Soak Black Chickpeas & High Pressure. Wash and soak the black chickpeas for 8 hours or overnight. High-pressure the 1/2 cup of black chickpeas in the Instant Pot with 1 1/2 cups of water for 40 minutes. Let the pressure naturally release. Drain and set aside.
Boil Potatoes, Cube & Add Spices. Boil the potatoes in the Instant Pot in 1 cup of water. High pressure for 12 minutes and let the pressure naturally release. Once cooled, peel and cube the potatoes. Add the cubed potatoes to a mixing bowl. Add spices - red chili powder, kala jeera (roasted cumin), chat masala, and black salt (kala namak). Mix well. Add fresh cilantro and mix. Set aside.
Spiced Yogurt. Combine yogurt and spices in a mixing cup. You'll need red chili powder, chat masala, kala jeera, and kala namak. Mix well. Add 2 tablespoons of water (more if needed) for a slightly runny texture.
Assemble Dahi Puri. Use your fingers to poke holes in the center of the puri (semolina puff). Fill each puri with some spiced potatoes. Next add boiled kale chane (black chickpeas). Add chopped onions. Fill with a couple of spoonfuls of spiced yogurt. Fill with a couple of spoonfuls of spiced yogurt. Then add tamarind chutney. Then add cilantro chutney. Sprinkle kala jeera, chat masala, and red chili powder. Top each puri with thin sev.
Garnish. Drizzle a little more spiced yogurt, kala jeera, and red chili powder. Top with a little more tamarind and green chutneys. Serve immediately! Enjoy!