To choose the freshest and most flavorful beets, look for varieties that have rich color and firm, smooth skin. If they look shriveled or have visible pits or soft spots, take a pass. Fresh beets may still have the greens attached. Beet greens are flavorful and nutritious. Slice them off for this recipe, but keep them to steam or sauté in a little olive oil as a side dish. They have a pleasant, earthy taste somewhat similar to Swiss chard.