De-seed your dried chilies and soak them in hot water for 10 minutes.
Soak 1.5 tbsp tamarind pulp in 1/2 cup warm water and mix until you get tamarind water. Dispose the seeds.
Meanwhile, add your baked or roasted peanuts to a high speed blender and pulse until you get coarse grains (but not too coarse)
To another blender (or the same one), add soaked chilies, shallots, lemongrass stalk (the purple part), ginger slices, and coriander powder.
Add 1-2 tbsp tamarind water to the blender to blend. Blend until you get a paste.
To a pan, add oil and the paste. Saute until fragrant, for 3-5 minutes. Add your crushed peanuts and saute.
Add water, kecap manis, coconut sugar, remaining tamarind water and mix until the mixture starting bubbling and you start seeing oil on top.
Add salt and squeeze some lime. Give it a good mix.
Serve with vegan satay, cucumber slices and rice cakes.