Thinly slice the lemongrass, galangal, and turmeric. Peel the garlic and shallots, and clean the coriander root.
Toast the coriander seeds, cumin, and black peppercorns in a dry pan over gentle heat until fragrant. Let them cool.
Add the salt, lemongrass, galangal, and toasted spices to a mortar. Pound until finely crushed.
Add the green chilies, coriander root, turmeric, makrut lime zest, garlic, shallots, and shrimp paste. Continue pounding until you have a thick, well-combined paste with no large pieces of fibrous ingredients.
Food processor method
Cut the lemongrass and galangal into small pieces. Toast the coriander seeds, cumin, and black peppercorns in a dry pan over gentle heat until fragrant. Let them cool. Add the ingredients and process, stopping to scrape down the sides as needed. The texture may be coarser than when using a mortar and pestle.
Notes
Use the nutrition card in this recipe as a guideline.