I never would have tried it, but my fiance is a big fan of mixing together anything we happen to have lying around - even if it sounds nasty. In this case, grilled gouda sandwiches turned out to be a success. Macaroni and cheese w/tuna, however, not such a success..
Wheat bread.
American cheese. Land of Lakes sliced by the deli. Not that fake individual wrapped Kraft stuff.
Turkey bacon.
Tomato slice.
Outside of bread is spread with mayo instead of butter.