Soak green moong dal and urad dal overnight.
Morning grind it to smooth paste using very less amount of water.
Keep it aside and let it ferment for 5-6 hours.
Add powdered oats, grated ginger, hing, curry leaves and baking powder. Mix it well.
Fry them nice golden. Soak in water for 5 mins.
In a bowl add curd, jeera powder, grated ginger and chilly powder.
Mix it well and add the vadas to it.
Yummy oats dahi vada is ready. Enjoy..