I've made this recipe to serve one, as my mortar and pestle is only big enough to hold 1 serving. You can double or triple the recipe if you have a really large mortar & pestle, or simply make each serving as required. The beauty of doing each serve means that you can tailor to individual tastes, adjusting chilli and adding less or more peanuts etc. Unrefined raw sugar can be used in place of palm sugar if desired and of course if you are not gluten-free, just use regular soy-sauce, opting for a light one like kikkoman though.
per serve.