To make the soup extra special, add some Parmesan crisps as a garnish. To make the crisps, you need a silicone baking mat, but apart from that, it’s pretty easy. Heat the oven to 375 degrees F; place the silicone mat on a cookie sheet and spread 1 cup grated Parmesan (the same kind you use for the soup; Italian Grana Padano or Parmigiano-Reggiano are the best choices); pat the cheese down to form a rough circle about 8 inches wide and 1/8 inch thick; bake for 8 minutes. Let cool. Snap into shards and sprinkle on top of the soup for extra texture.