Soak both lentils seprately overnight.
DON'T THROW all the water out keep like ½ cup of water from each lentil.
Set the lentils and water separately.
Add the Urad lentil in the food processor then add ginger garlic paste and add 3 tsp of soaked urad dal water that you saved earlier, and start the food processor. (Remember it shouldn't be runny.)
Now take the Moong dal and add that to the food processor; Only add 2 tsp of water and don't add ginger garlic paste this time.
Now you can discard remaining water from soak lentils
Now Mix both batter together.
Add salt,baking powde, and baking soda.
Mix it for ten minutes by hand in the SAME direction for 10 minutes continuously.
Now your fritter batter texture should be airy.
Add salt and cumin seeds.
In a medium wok, on medium heat, heat the oil.
Take a spoon and dollop the batter across the wok to make little fritters.
Deep fry them until light golden.
Now you put them on a kitchen towel to soak the excess oil then put them in the fritter water for 30 minutes.
After 30 minutes, you put between your palms and squeeze the water out gently.
Place them in yogurt mixture.