Pork, Sage and Onion stuffing

Ingredients

• 2 lb (900 g) good-quality pork sausage meat or finely minced pure pork
• 1 heaped dessertspoon dried sage
• 1 large onion, grated or very finely chopped
• 4 heaped tablespoons white breadcrumbs
• 1 egg, beaten (optional)
• salt and freshly milled black pepper