Dry-roast cumin, coriander and cardamom seeds with cloves, cinnamon sticks and dried chillies over gentle heat until fragrant. Cool, then grind to a fine powder.
Dry-roast shrimp paste over gentle heat until fragrant.
Blend fresh chilli, garlic, onion, peppercorns, coriander root and vegetable oil to a fine paste in a food processor. Cook paste over g