Spiced duck arepas with blueberry port sauce

Ingredients

• 1 tsp Chilli Powder Hot
• 1 tsp Cardamom Pods , husks discarded and seeds ground
• ½ tsp Sea Salt
• ¼ tsp Coarse Ground Black Pepper
• 1 boneless duck breast half, with skin
• 175 g (6 oz) blueberry jam
• 125 ml (4 fl oz) port
• 1 tbsp onion, finely chopped
• ½ tsp Cardamom Pods , ground
• 2 tbsp butter
• 1 tsp lemon juice
• 125 ml (4 fl oz) water
• 75 g (3 oz) white cornmeal
• 50 g (2 oz) masa harina
• 100 g (4 oz) butter
• ¼ tsp Sea Salt
• thin strips of lemon peel to garnish