Traditional Southern preparation for greens. These can be made a day or two ahead, and actually they taste even better if you do make them ahead of time. If you want these to be vegetarian, leave out the bacon and use vegetable stock instead of ham hock stock or chicken stock. I use Recipe #442908 in this recipe, and it is the most authentic way to make them, but if you don't have the time you can just use low sodium chicken stock. You will notice that the recipe calls for 4 to 6 bunches of collards - this is because bunches can vary in size. If the bunches are big, you only need 4. If they are on the smaller side, use 6. You can use this same preparation for other greens as well - kale, mustard, turnip, etc.