First, butter one side of each slice of toast for grilling:
My favorite of the two I made was the Gruyere, Prosciutto, Arugula, and Tomato on White (sourdough for me)
I didn't have any apples, but I made a modified version of the Sage, Fontina and Apple sandwich on Rye with pear in place of the apple...
Both were delicious! A classic grilled cheese sandwich is always fantastic, but it's fun to try new ways of dressing up an old favorite... :-)