Ingredients: For the Meatballs: 500g ground pork 500g ground beef 40g breadcrumbs ½ onion, finely grated 125ml beef stock or milk 1 egg 1 tsp allspice 1 tsp black pepper 2 tsp salt 1 tsp Worcestershire sauce 1 tbsp vegetable oil For the Meatball Sauce: 1 tbsp butter or vegeta…