Cut the edges of the banana and give a small prick to potato. Boil banana and potato in pressure cooker. At my place I take one whistle.
Let the pressure cooker cool down and pressure be out. Take the banana and potato out from the water and peel them. Let boiled banana and potato cool down for some time.
Once they are cold enough to handle grate them using grater. Add gram flour, ginger and salt. Mix everything and knead the mixture with your hands like a dough.
Take small portion of banana potato dough and make balls out of it. Press them gently to give them disc shape.
You can deep fry these discs or cook them in appe pan as shown in the video till vadas become brown as crispy.
To serve dahi vada, beat yogurt to smooth paste and season it with little sugar and salt.
Whenever you are ready to serve dip vadas in yogurt and take them out on a serving plate.
Top it with some extra curd, sweet and sour chutney, sprinkle some red chilly powder, cumin powder and chaat masala.