Chop off the tops, give a good scrub.
Wrap in foil. Roast at 350 until caramelized, golden brown 30-40 minutes. Check at 15 minutes and give a turn.
Use paper towel to rub off skin. Cool completely.
Use mandolin to slice beets very thin.
Toss arugula with dressing below, using just a little at a time, as arugula does not need a lot of dressing.
Arrange beets on flat dish. Put arugula in middle. D
Drizzle dressing over beets. Toss a few nuts onto salad.