Hot-and-sour oxtail

Ingredients

• 10 brown shallots
• 10 garlic cloves
• 8 dried long red chillies, seeds removed
• 2 tbsp ground cumin
• 1 tsp turmeric powder
• 2 stalks lemongrass, bruised
• 4cm piece galangal, sliced
• 2kg oxtail (trim any really fatty pieces)
• 5 makrut lime leaves, crushed
• 400ml tamarind water (available from Asian grocery stores)
• 3 tbsp palm sugar
• 3 tbsp concentrated tomato paste
• sea salt and freshly ground pepper
• ½ bunch coriander, leaves only
• steamed rice, to serve