Thinly slice everything to make pounding easier and faster.
Lightly roast the black peppercorns, coriander seeds, and cumin in a dry pan to release their aromas.
Use a mortar and pestle to pound salt, lemongrass, galangal, and the toasted spices. Crush them until they form a fine mixture.
Add the remaining ingredients and keep pounding until you achieve a smooth, cohesive paste.
Notes
Use the nutrition card in this recipe as a guideline.
I used spicy Thai Jinda chilies, available at most Asian grocery stores. If you like a mild green curry paste, try adding green cayenne peppers, jalapeños, or other mild green chilies and reduce the amount of spicy chilies used in this recipe.
This recipe yields 8.4 oz of curry paste, you can store it for later use.