Toss the beets with the dressing (optional): Place the beets in the bowl with the dressing and stir. The beets will change the color of the dressing to a bright pink color and infuse a little sweetness. If you’d rather keep the balsamic vinaigrette color, you can skip this step.
Assemble the salad: Thinly slice the shallot. Place the greens on a plate. Remove the beets from the dressing bowl and place them on top. Add crumbles of goat cheese, shallot, and chopped pistachios. Drizzle with dressing and serve.