Gruyère Smash Burger in Khobar | Black Angus Smash Patty with Fermented Chilies Our signature Thermo smashed burger with Gruyère cheese, caramelized onion, lettuce, pickles, fermented chilies, and our homemade signature sauce. Served with rosemary-seasoned fries. A must-try smash burger in Khobar, Saudi Arabia.