Stir fermented batter and add more warm water if needed. The batter consistency should be thinner than pancakes. Taste for salt and add more if needed.
Start boiling water in the idli/idla steamer. Place greased thali (steamer tray) in the steamer while the water is boiling to heat up the thali.
Take ½ cup batter out in a small bowl. Add ½ tsp of eno and mix it very well till you see it foaming.
Pour it into the hot thali right away. Cover it and cook it for 5 min.
While it is cooking for 5 min, take ⅓ cup batter out in a bowl. Add 2 tbsp spinachy peanut chutney to this batter and mix it well. Add ½ tsp of eno to it and mix it well until it becomes frothy. The first layer should be done cooking for 5 min by now.
Pour green batter on top of partially cooked white layer, into the same thali in the steamer and cover it. Steam for 15-20 minutes on medium to high heat.
Once it is steamed, take it out and let it cool down for at-least 20 minutes. Cut it into squares and keep them aside in a bowl, cover it while other idlas cook.
Repeat the process of making layered idlas.
Once all idlas are cooked, prepare tempering.