Pani Puri
Literally meaning "water pancake", pani puri is a crisp, deep-fried hollow dough ball commonly filled with spiced water, sweet tamarind chutney and potato, onion and chickpeas flavoured with chaat masala. These morsels hold together for mere moments, so they're best eaten all in one. While they're eaten across the country, the names differs depending on the state - look out for "golgappa" in Delhi and "phuchka" in Bengal.