Dahi Vada is a type of chaat. Dahi Vada is a North Indian street snack made with lentil patties in yogurt, flavored with chutney and spice powders. Dahi Vada are pancakes with lentils dipped in yogurt. Dahi is "yogurt" and fada "fried lentil pies". You can make vada a day or two ahead and store it in airtight containers in the refrigerator.