These easy mixed greens are cooked with ham hocks, a little vinegar, and seasonings. Use collard greens and turnip greens in this recipe. A big pot of greens is known as a mess o' greens on the southern table. Cooked greens are a staple in the south, where one study found they were a favorite food among older adults. Greens are an excellent source of vitamins a and c, calcium, iron, fiber, and antioxidants. While you will spoon out the greens into a serving dish, true southerners don't discard the liquid, known as pot liquor (or likker). Instead, you serve that as well for your guests to dip their hot cornbread into.