Making the French Onion Burger at Topgolf in Las Vegas – VIDEO

Kreg Klaver, executive chef at Topgolf at MGM Grand in Las Vegas, makes the French Onion Burger by topping a 7-ounce beef patty with horseradish-Dijon, caramelized onions, Gruyere and crispy onions, on a pretzel bun. (Heidi Knapp Rinella/Las Vegas Review-Journal)