Motswanan Groundnut Stew

Name: Motswanan Groundnut Stew
Ingredients: 4 (600 g) bone in chicken thighs; 1 tbsp brown sugar; 1 tsp chilli flakes; 1 tbsp fresh ginger, grated; 100 g organic peanut butter; 2 tbsps tomato paste; 200 ml chicken stock; 1 tbsp coconut oil; 1 large onion, chopped; 1 tsp salt; 1 hot chilli, deseeded and sliced; 1 can (400 g) good quality tomatoes, chopped; 200 mls water; good pinch mace; To finish:; chilli, sliced (optional); 2 tbsps fresh coriander leaves, chopped; 1 tbsp dry roasted peanuts, crushed slightly