Preheat oven to 400F. Scrub beets and cut off top and bottom. Cut into small chunks; the small ones can be cut in quarters, and the larger ones can be in sixths.

Place on a rimmed baking sheet and sprinkle with olive oil, salt, and pepper to taste. Toss well to coat evenly. Roast for 35-45 min. turning once or twice. I like to wait until they are starting to brown before turning, probably at 20 min. mark or longer.

Remove from oven and season further with salt and pepper if you like and add the thyme. Serve hot.