Grind the Spice Paste ingredients to a paste 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 Spice Paste over medium to high heat for 5 to 7 minutes until fragrant. Add the palm sugar, salt and coconut milk, and bring to a boil. Add the lime juice and prawns, and cook over high heat for 3