The first time I cooked and ate roasted beets, I wished I had done it sooner. They are delicious and very easy to cook. When I shop for fresh beets in the supermarket or the farmers market I not only look for uniform shaped beets, but I also look for nice-looking greens as well. The advantage of buying fresh you also get the greens.
Trim the beets at the top and the bottom. You can get an idea of where and how far just by the picture above. Wash them thoroughly because sometimes they can be quite dirty. Place the beets into a shallow roasting pan or baking pan and drizzle olive oil over them and use your hands to coat them with the oil so they are covered all the way around. Sprinkle with salt and pepper and cover. I usually line a pan with aluminum foil, put the beats in, add the oil salt-and-pepper, and cover with foil. Then I put the pan into a preheated 350° oven. I usually bake for an hour and 15 minutes. To check and see if the beets are done I poke them with a toothpick. If it goes through easily than you know they are done. I let the beets rest a little at this point for about 5 to 10 minutes. This lets them cool a little bit so I can handle and peel them. The next thing to do is peel the outer skin. I usually just use a small paring knife and scrape the skin off. They Now you can just slice and eat. Do not throw your beet greens away. I wash the greens thoroughly and saute them in olive oil with a little salt-and-pepper. I also put them in stir fried dishes and some pasta dishes. Anyway that you do it, they are delicious.