This sandwich just tastes like fall. If you want it to be more substantial, a slice of ham or a piece of smokey bacon would not be out of place.
Ingredients
Pumpernickel Bread, thickly sliced
Apple (I used Honeycrisp) slices
Sharp White Cheddar, grated
Red Onion, thinly sliced
Dijon Musard
a little Butter and/or Olive Oil for grilling
Instructions
Spread 2 pieces of bread with Dijon mustard. Sprinkle with a little cheese, top with apples and onions. Sprinkle with black pepper, if you like, and top with more cheese. Top with remaining piece of bread.