Trim away all but 1 inch of the green tops from the beets, leaving the skins and roots; scrub well. Cover the beets with cold water in a large pot, add 2 tablespoons salt, and bring to a boil. Reduce the heat and simmer, partially covered, until the beets are tender, about 40 minutes to 1 hour. Add additional water if necessary to ensure that the beets remain covered. Dr