Arrange the lettuce on a medium-sized plate or bowl.In another medium-sized bowl, add the diced beet, orange with juices, balsamic vinegar, and olive oil. Gently toss.Spoon the dressed beet and orange mixture over the lettuce.Top with the avocado and pepitas.Season with salt and pepper. *To roast beets, wrap each beet in foil and place directly on the middle rack of a 425 degree oven. Roast until a knife inserted in the center meets little resistance. Once cool enough to handle, rub the skins off with your fingers. Dice or prep as desired.