Filet-O-Fish Sandwich Now Twice as DeliciousThere are many delicious things with which you could embellish a McDonald’s Filet-O-Fish sandwich — if your goal was to make it even more calamitous to the waistlines of the general Filet-O-Fish-loving public than it already is. A Scotch egg, a pound of bacon, or a deep-fried Snickers bar all spring to mind. But if you really wanted to go all out, if you really wanted to vex the fast-food police, what you might do is simply plop an additional Filet-O-Fish on top of the first one.