Preheat the oven to 350 degrees (175 degrees C). Wash the beets thoroughly, leaving the skins on, and remove the greens. Rinse greens, removing any large stems, and set aside. Place the beets in a small baking dish or roasting pan, and toss with 2 tablespoons of olive oil. If you wish to peel the beets, it is easier to do so once they have been roasted.