In blender, puree broth, onion and garlic. Pour into large bowl, combine with beef, pork, veal, eggs, breadcrumbs, parsley, cheese, pepper flakes and salt

With oiled hands, shape into 1/4 cup balls ( approx 16 balls )

In 10" skillet, heat 1/2" oil over medium heat, add meat balls in batches, cook turning occasionally, until browned, 10 min

add sauce and simmer for 1 hour