Soak the dry red spur chilies in lukewarm water for about 10 minutes to soften them. Drain thoroughly to remove excess water before adding them to the paste.
0.7 ounces dry red Thai spur chilies
Start with the dry ingredients—dried chilies, lemongrass, galangal, and salt. Pound them in the mortar until they are finely broken down.
0.2 ounces dry chilies, 1 ounce galangal, 1.8 ounce lemongrass, 0.2 ounces salt
Next, add the soaked red spur chilies, kaffir lime zest, turmeric, shrimp paste, garlic, and shallots. Continue pounding until the mixture forms a smooth, fine paste.
0.2 ounces kaffir lime zest, 0.2 ounces turmeric, 0.7 ounces shrimp paste, 1.8 ounce garlic, 1.8 ounce shallots