Preheat oven to 350°F (180°C).

Cut off greens from beets. Wash and pat dry. Place beets on a large piece of aluminum foil.

Drizzle with olive oil. Fold the foil over and crimp the edges, creating a pouch.

Roast beets until tender, about 1 to 1½ hours. Remove from oven.

When beets are cool enough to handle, remove peel. They should slip off easily.

Slice beets and place them on a bed of mixed baby greens. Drizzle with more olive oil and sprinkle feta cheese and basil on the top.

Serve immediately.