Upgrade Your Filet-O-Fish with a Bun Swap Hack

McDonald's Filet-O-Fish sandwich can be customized by swapping the regular bun for an English muffin, offering a denser texture and tangier flavor due to the dried rye sourdough. Former McDonald's chef Mike Haracz suggests this swap is possible if the restaurant staff is accommodating. Additionally, replacing the tartar sauce with Mac sauce can add a unique zest to the sandwich. This customization provides a new twist on the classic sandwich, which has been popular since the 1960s, especially during Lent.