You won’t believe how incredible even a simple brothy soup can be until you try boosting the broth flavor with parmesan. No, you don’t need a big, expensive hunk of cheese for this trick. Instead, you can either save up your spent parmesan rinds in a tightly sealed container in the freezer until you have at least a few, or you can purchase parmesan rinds from the grocery store cheesemonger for a low cost. Let the rinds simmer with any additional aromatics, like garlic and hearty herbs, for several minutes to a few hours. Remove the rinds before adding additional ingredients and serving up your rich, flavorful soup.