Trim the leaves and reserve. Pre-heat the oven to 400 degrees. Place the beets in a covered baking dish with a little water, and cook until tender, about 40 minutes.
Cool the beets until they can be easily handled, peel and julienne them. Blanche the leaves and stems, and then chop them. Mix together with the julienned beets.
Combine the vinegars with the sugar and salt, and then add the oils. Dress the beets while still warm with the parsley and vinaigrette.
Season with black pepper and serve.