4-6 medium green chillies, de-seeded and roughly chopped
small bunch of fresh coriander, stalks and roots attached if possible
2.5cm/1in piece galangal, peeled and chopped (if available)
2 garlic cloves, crushed
5cm/2in piece of fresh ginger, peeled and grated
2 lemongrass stalks, chopped (if unavailable, use 2 tbsp dried)
1 lime, grated zest and juice
2 shallots, roughly chopped
1 tsp black peppercorns, crushed
1 tbsp coriander seeds, crushed
1 tsp ground cumin
2 tsp Thai fish sauce or light soy sauce
3 tbsp olive oil
8 lime leaves, torn into pieces (if unavailable, use the grated zest of 1 extra lime)