I cut a small loaf of olive ciabatta in half, and layered the following:
-sliced herb-crusted salami
-sun-dried tomatoes (in olive oil)
Then stuck it under the broiler, just until the cheese melted and the bread was toasted (only took a few minutes).
I bet this would also be good with things like sliced marinated mushrooms, artichokes, or olives (I would have used olives, if my bread didn't already have them baked in)