Duck Ragù with Creamy Polenta - Italian Recipe

Ingredients

• 1 (4 1/2-pound) whole duck, cut into pieces, skin scored
• Sea salt
• cracked black pepper
• 1 leek, white part only, sliced
• 4 cloves garlic, sliced
• 3 1/2 ounces smoked pancetta, chopped
• 10 sprigs thyme
• 2 tablespoons tomato paste
• 1/3 cup malt vinegar
• 1 (14-ounce) can chopped tomatoes
• 2 1/2 cups port
• Amaranth leaves, to serve
• 1 liter milk
• 1 cup instant polenta
• 1/4 cup (1/2 stick) unsalted butter, chopped
• 1/2 cup whipping cream
• 1 1/2 cups finely grated Parmesan, plus extra to serve