Mix all ingredients and form into golf ball sized balls. Fry in skillet on medium heat turning until cooked. You can also bake these at 350 degrees for about 20 minutes. (If desired, cool and place in Zip-lock Freezer Bag until ready to serve.) While meatballs are cooking, warm up marinara sauce and split apart hoagie rolls. Place hoagie roll on cookie sheet. Assemble meatballs in hoagie roll, top with sauce and cheese. Broil until cheese is golden brown.