Grilled Cheese with Apples

I love using apples in sandwiches, especially granny smith apples! Their tartness gives great flavor to savory dishes. I put them in turkey sandwiches with smoked cheddar and I chop them up finely along with onions and mix into my tuna salad. How do you use apples on the savory side?

Check out Minimalist Baker's rendition of a yummy grilled cheese sandwich! Doesn't this look amazing?