Beets are known for their sweetness. When they are roasted, their flavor intensifies to a rich, earthy one. They need little in the way of added fat to taste good; here, they’re marinated in a horseradish vinaigrette.
The red beet is the most common variety. But you can buy colorful heirloom yellow, white and variegated beets at farmers markets and specialty stores. They look pretty mixed together in this dish.
Beet greens are nutritious and can be steamed and served with the beets, if you wish. Steam the greens about five minutes.