Ever think about how many different kinds of sandwiches there are? All you have to do is slap two slices of bread around anything edible, and you're good to go. Hot, cold, elaborate, simple, thick, thin, foreign, American ... there are no limits.
But I just realized today there is one sandwich that not once in my life have I seen.
A pickle sandwich.
Why not? Even though it's normally a secondary ingredient, there's no reason a pickle couldn't step up to become the featured item. I think I'll have to try it one of these days.