Vegetarian Collard Greens
Southern-style collard greens get their signature richness from being braised with ham hocks or bacon. For a meatless flavor boost, use an umami-packed Parmesan rind instead (find one made without rennet for a strictly vegetarian version). The rind will hold its shape as the greens simmer, so you can remove it from the pot in one piece when done.
Martha Stewart Living, April 2014