Learning how to cook beets is easy, and it will come in quite handy if you love the superior flavor of fresh, whole beets.
Preheat the oven to 400°F.
Roast in the preheated 400°F oven until they are fork tender, about 1 hour. (Stick a fork into the thickest part of the beet and if it slides off easily, they're done.) You should check the beets after about 20 minutes and sprinkle them with water (a couple tablespoons), and then re-seal the foil to finish the cooking process.