What is a prominent ingredient in the avocado tartine, making it colorful?

The prominent ingredient in the avocado tartine that adds a vibrant color is roasted beets. Beets are known for their deep red and purple hues, which not only enhance the visual appeal of a dish but also provide a rich, earthy flavor that complements the creamy texture of avocado. Roasting the beets can also intensify their sweetness and manage the natural earthiness, making them a delightful addition to the tartine. The use of roasted beets in this dish allows for a beautiful presentation, contrasting with the green avocado, and elevating the overall sensory experience of the meal.