Among the curry pastes, sour curry paste is one of the easiest one to make: the ingredients are relatively easy to source and then, since there is no fiberous lemongrass, easy to pound in the mortar. It takes no more than 10 minutes to make. I usually make it on the fly.
This recipe is for a wimpy southern sour curry lover like me. Southerners eat very hot food. If you feel like being a southerner for a day, quadruple the amount of fresh and dried chili peppers!