Proper British Sausage Rolls: Crispy, Flaky Classic

Ingredients

• 1 lb (450g) good quality pork sausage meat (or 8-10 sausages, casings removed)
• 1/2 medium onion, finely chopped (about 1/2 cup/75g)
• 1 clove garlic, minced
• 1 tbsp fresh sage, chopped (or 1 tsp dried sage)
• 1 tbsp fresh thyme, chopped (or 1 tsp dried thyme)
• 1/4 tsp ground nutmeg
• 1/4 tsp black pepper
• 1 tbsp breadcrumbs (optional, helps bind the mixture)
• 1 tbsp Worcestershire sauce (optional, for added depth of flavour)
• 2 sheets (about 1 lb/450g total) ready-made all-butter puff pastry, thawed according to package instructions
• 1 large egg, beaten
• 1 tbsp milk
• Sesame seeds or poppy seeds (optional, for topping)