he Zesty Italian Onion Burger is a super moist and savory burger. 6 pounds 80/20 ground beef mixed with Zesty Italian dressing, Worcestershire, rosemary, garlic and sweet onion kick it up a notch. Grilled over an oak wood fire on a Scottsdale Santa Maria style cooker. The icing on the cake is adding a heaping pile of sweet onions sautéed in butter until caramelized then stirring in some Home style beef gravy for a rich beefy onion flavor. Oh this is good!