Spicy African chicken stew

INGREDIENTS

• 500ml chicken stock , heated
• 340g jar smooth peanut butter
• 2 onions , halved and thinly sliced
• 3 tbsp sunflower oil
• 3 tbsp finely chopped ginger
• ½-1 tsp cayenne pepper (optional)
• 3 tsp ground coriander
• 3 tsp ground cumin
• 1-2 scotch bonnet chillies, deseeded and chopped
• 2 bay leaves
• 400g can chopped tomatoes
• 2 x 800g pack chicken thighs and drumsticks, skinned
• 3 sweet potatoes , cut into chunks
• 2 red peppers , deseeded and cut into chunks
• good handful coriander , chopped, a little reserved for sprinkling
• rice and lime wedges, to serve (optional)