Caramelized Onion Swissburgers

Looking to up your burger game? This swiss cheeseburger will blow your mind. The savory beef patties are seared until browned, topped with melty Swiss cheese and buttery caramelized onion, and stuffed into toasted potato buns. Of course, no burger would be complete without a decadent sauce—this one combines mayo, roasted garlic, and horseradish paste to create a punchy spread. …