Preheat oven to 375°. Rinse beets under cold water and pat dry; rub with oil and salt. Wrap beets individually in aluminum foil; place on rimmed baking pan and bake 1 hour or until easily pierced with knife. Carefully open foil to allow steam to escape; let stand 20 minutes or until cool enough to handle. Peel beets; slice ¼-inch thick and cut into quarters. Cool completely.
In large serving bowl, toss arugula, strawberries, raisins, pistachios, dressing and beets. Makes about 8 cups.