Slice very thin slices from the end of one half, until you have enough to cover your bread (not overlapping. Now take your shallot, and shave paper thin slices, about 4 or 5- reserve rest of shallot for another use. Then take your garlic clove, and shave paper thin slices of garlic from the clove, about 4 or 5 slices, reserve rest of garlic for ).
Heat 1/2 tablespoon butter and lightly fry the apple, shallot and garlic. Fry for about 2 minutes and then remove to a plate.
Take one slice of bread, butter one side, and then salt it and place it in the pan, and continue by placing 1 slice of cheese on the bread, layer the apple slices evenly over the piece of bread and randomly place the garlic and shallot pieces, place other piece of cheese on top, and then take second piece of bread, butter and salt one side, and place it on top of the cheese slice, butter side up.
Fry the sandwich over medium heat until browned on both sides, pressing down on the sandwich whiling cooking to slightly flatten it out; When browned nicely, cut in half and serve.