Bring a covered medium pot of water to a boil over high heat. Add the beets and cook, uncovered, at a medium boil for about 20 minutes until fork-tender. Drain and set aside.
Place the lettuce, onion, carrot, cranberries, garlic, and oregano in a salad bowl.
Using two wooden spoons, toss to combine. Drizzle the walnut and olive oils evenly over the sa