Place bacon in a food processor; cover and process until finely chopped. In a large bowl, combine the milk, egg, bread crumbs, onion and seasonings. Crumble the bacon, pork and beef over mixture and mix well. Shape into 2-inch meatballs. Place in an ungreased 15x10x1-inch baking pan. Bake at 425°F for 30 to 35 minutes or until a meat thermometer reads 160°F. Spread ranch dressing over rolls. Layer each with salad greens, a tomato slice and a meatball; replace tops.
Sponsor recipe courtesy of Sam's Club