Preheat oven to 425°. Combine beets, ¼ cup vinegar, 2 Tbsp. oil, and ¼ cup water in a baking dish; season with salt. Cover with foil and steam until beets are tender, 40–50 minutes. Let cool slightly. Rub off skins with paper towels; cut beets into quarters (or ½” wedges if larger).