Mix together the ground Beef and Pork. Add plenty of salt and some pepper, and work the mixture together well with your hands. Mold small sausage-shaped rolls, 2 inches long and the width of a finger, from the mixture. Place the rolls on a hinged grill basket and cook them quickly, turning them frequently so that they brown evenly, for about 6 minutes. Serve the rolls with chopped Onion.