Traditionally for making chammanthi, all the ingredients are ground on a stone-grinder or ammi kallu.
I don't have an ammi kallu so I grind in a blender.
To a blender jar, add all the ingredients & grind to a coarse paste.
Based on your spice level, you can add green chili & chili powder.
Don't make into a smooth paste.
Don't add too much water & make into a watery paste, grind with less water, 2 to 3 tbsp.
Transfer the mixture to a bowl.
This is enjoyed with rice or rice porridge.
Recipe by Cooking with Thas - Smart Cooking, Smart Living at https://thasneen.com/cooking/kerala-pothichoru-kerala-meal-wrapped-in-banana-leaf-vazhayila/