I recently had lunch at City Bakery.
This particular day their daily sandwich was an open faced sandwich topped with hummus and grilled veggies (tomato, eggplant, asparagus, red and yellow peppers).
They also drizzled some balsamic vinegar and sprinkled lots of cheese. I think the cheese was either pecorino or parmesan.
I enjoyed the crisp edges of the toast.
I hope to recreate this one!