Wring out your roll soaked in water (I let it soak for about 10 to 15 minutes ).In a large bowl, combine ground beef and pork, roll, onion, eggs, salt and pepper.
½ pound ground beef, ½ pound ground pork, 1 white, crusty roll, 1 medium onion, 2 eggs, 1 teaspoon fine sea salt, 1 teaspoon ground black pepper