Preheat oven to 400. Using a shot glass or back of a spoon, push bread down to make a little hole for your cheese. Slice cheese in half and put a slice in both slices of ciabatta. Bake for about 5 min or until cheese is melty.
Clean mushrooms and add to the skillet. Season with salt and pepper. Let them brown and release some liquid. After about 5 min, add butter and thyme to the skillet.
Cook until mushrooms are tender, about another 5 min or so.
Add mushrooms to toasted, cheesy bread and top with a few summer truffles, arugula and balsamic glaze. Enjoy!
Video
Notes
You could sub with another goat cheese if you can't find Cana de Cabra. I get it at the cheese section of Whole Foods Market.