In my case, I use raw peanuts. If you have unsalted roasted peanuts, it is easier. You may skip the pan fried peanuts in oil. In a pan, heat 3 tbsp cooking oil, pan fry the peanuts for 5-8 minutes. Transfer it on the plate with napkin. Let it cool down. Afterward, remove the skin of the peanuts (optional). I do it to reduce the bitterness of the peanuts skin.

Ground the peanuts with food processor/mortar and pestle. Add little dash of oil, salt, sugar/palm sugar, chili powder, fresh chili.

Ground it for 1-2 minutes. It is done and you may store it in the fridge.

Other options: in a non-stick pan, heat 1 tsp cooking oil, stir fry chopped onions, add the peanut pastes, tamarind paste, 2 tbsp water. Stir fry it in low heat until the paste a bit thicker.