In a large bowl, combine egg, bread crumbs, Parmesan cheese, onion, parsley, garlic, Italian seasoning or rosemary, salt and pepper.
Add ground beef; mix well.
Shape into 28 meatballs about 1 1/2 inches in diameter.
Arrange the meatballs in a 15 x 10 x 1- inch baking pan.
Bake meatballs in 350 degree oven fro 15 to 20 minutes or until done (no pink remains).
Drain off the fat.
You can cook these in a skillet as well- Prepare the meat mixture as directed above and in a large skillet cook half the meatballs at a time in 1 tablespoon hot butter over medium heat for about 10 minutes or until no pink remains, turning to brown evenly.