Roasted Beet, Avocado and Pistachio Salad

From http://allrecipes.com/recipe/230871/roasted-beet-avocado-and-pistachio-salad/

Ingredients
3 large beets
extra-virgin olive oil
balsamic vinegar
salt and ground black pepper to taste
1 avocado - peeled, pitted, and cut into bite-size pieces
2 tablespoons extra-virgin olive oil
1/4 cup shelled pistachio nuts
1/4 cup dried cherries
1/4 cup shredded Parmesan cheese
1 tablespoon extra-virgin olive oil
1 tablespoon balsamic vinegar
1 pk mixed greens

Preheat oven to 375 degrees F (190 degrees C).

Cut stems off beets and place whole on a baking sheet. Roast until fork tender, about 45 minutes. Allow to cool; peel and dice beets into large bite-sized pieces. Toss with 1 tablespoon olive oil and 1 tablespoon balsamic vinegar in a bowl; season with salt and black pepper.

Toss diced avocado with 2 tablespoons olive oil in a separate bowl; season with salt.

To serve, divide salad greens between serving plates. Top each serving with 1/4 of the beets and avocado. Sprinkle each serving with shelled pistachios, dried cherries, and shredded Parmesan cheese. Drizzle with remaining 1 tablespoon olive oil and 1 tablespoon balsamic vinegar. Season with salt and ground black pepper to taste.