I prefer to roast beets, rather than boil or steam them, for four primary reasons: Roasting is the best method for retaining their bright color and naturally sweet flavor. Boiling and steaming leach more vitamins from the beets than roasting does. Cooking beets in the oven is especially easy because you don’t have to keep an eye on the water level in the pot or steamer. And finally and best of all, roasting doesn’t make a mess. Here are three easy methods for roasting beets.