firstly, in a kadai heat 3 tsp oil and splutter 1 tsp mustard, ½ tsp urad dal, 1 tsp chana dal, ½ tsp cumin and few curry leaves.
also, add ½ tsp ginger paste and 2 chilli. saute slightly.
further, add 1 carrot and ¼ tsp turmeric and saute for 2 minutes.
now add ½ cup rava and roast on low flame until it turns aromatic.
add powdered oats and mix well.
transfer the mixture and allow to cool completely.
add in ½ cup curd and ½ cup water.
mix well making sure there are no lumps.
further add 2 tbsp coriander, ¾ tsp salt and ½ cup water.
mix well making sure to form an idli batter consistency.
rest for 20 minutes or until the rava absorbs water.
just before steaming add a ½ tsp eno (fruit salt) and mix well.
steam the oats idli for 15 minutes on medium flame.
finally, serve instant oats idli with coconut chutney and sambar.