Sponsored: Ultimate Prosciutto di Parma sausage rolls recipe | Sainsbury`s Magazine

Ingredients

• 500g sausage meat, squeezed from about 8 good-quality sausages
• 1 small red onion, coarsely grated
• 2 garlic cloves, crushed
• 2 tsp fennel seeds, lightly crushed
• ½ tsp chilli flakes
• 1½ tsp dried oregano
• 1½ tbsp tomato purée
• plain flour, to dust
• 1 x 320g sheet ready-rolled puff pastry
• 8 slices Prosciutto di Parma
• 1 medium egg, beaten
• ½ tsp nigella seeds (optional)