Firstly to make idli upma, crumble the refrigerated idlis. Set aside.
Heat oil in a pan on a medium heat. Add cumin and mustard seeds.
When they begin to splutter, add dals, peanuts and fry until the peanuts are golden & aromatic.
Add onions, curry leaves, green chilies and ginger.
Saute just for 1 to 2 mins until the onions turn slightly pale.
If the pan is too hot sprinkle 1 tablespoon water and add turmeric and hing.
Add the crumbled idlis, coconut and coriander leaves. Mix everything well.
Lower the flame and cook covered until the crumbled idlis turn hot.
Taste test and adjust salt as needed.
Serve idli upma hot with idli podi, peanut podi or just with tea.