In a bowl add semolina ,besan ,oats, yogurt,sugar,salt,oil and mix well.
Keep aside for 10 min.and then add water and whisk nicely .
Add baking soda and pour into a greased cake tin.
Keep the tin in the steamer and cook for 10 min.on a low flame .switch the flame off and take the tin out.
Put the tin back into the steamer for 10 min.on high flame.
Let the batter come down to room temperature completely.
In a pan heat oil and crackle mustard seeds in it.
Turn the flame off and add asafoetida ,curry leaves,green chillies and stir.
Delicious oats dhokla is ready to eat .