Satay marinade

• 27 dried chillis
• 20 shallots
• 14 garlic cloves
• 3cm + 3 slices galangal
• 2.5 tsp tamarind pulp
• 6 lemongrass stalks
• 3.5 tbsp coriander powder
• 2.5 tsp cumin powder
• 100ml coconut milk
• 350g boiled saltless peanuts
• 40g soft brown sugar
• 3 tbsp white sugar
• 3.5 tsp salt
• 2 tbsp maltose
• 35 bamboo skewers, soaked
• 100ml neutral oil
• 1.5 tsp tumeric powder
• red onion to go on the side (cut into skewerable pieces)