Balinese-style roast duck recipe

Ingredients

• 1 duck (about 2kg)
• 2 tbsp grapeseed oil
• 2 garlic cloves, thinly sliced
• 1 bunch water spinach, large stalks trimmed (see note)
• Spice paste
• 4 candlenuts (see note)
• 2 tsp coriander seeds
• 1 tsp cumin seeds
• 2 cloves
• ¼ tsp white peppercorns
• 4 golden shallots, coarsely chopped
• 4 garlic cloves, halved
• 4 long red chillies, coarsely chopped
• 10 gm each turmeric, ginger and galangal, coarsely chopped
• 3 tsp coconut oil
• 3 tsp shrimp paste
• 80 ml (1/3 cup) tamarind extract (see note)
• 30 gm light palm sugar, crushed