Grind the candlenuts, lemongrass, chillies, shallots and garlic in a mortar or blender, adding a little oil if necessary to keep the blades turning.
Heat the oil in a wok and stir-fry the ground ingredients over medium heat for 5 minutes until fragrant. Add the coconut milk and gently bring to a boil.
Reduce the heat, add the tamarind juice and peanut