This decadent version of a traditional cheeseburger has style and panache, as well as great flavor. Creamy, melty Gruyère adds a layer of richness to the burger. Grilled onions pack a smoky and slightly crunchy punch that cuts through the other decadent ingredients. Smooth avocado, fresh tomatoes, and jalapenos form a deliciously refreshing guacamole that is the perfect companion to the rich burger. Served with sweet potatoes on the side for a salty-sweet complement, this burger is outstanding.