Pre-heat oven to 400 degrees. Line a baking sheet with foil. If desired, toss beets in about 1-2 tsp of olive oil and season with salt and pepper. Arrange in single layer on baking sheet and roast for 35 minutes or until fork tender.
Season chicken breast with salt and pepper and grill until cooked through. Allow to rest for about 5 minutes, then slice thinly.
Whisk together all dressing ingredients and set aside.
Divide arugula, beets, chicken breast, pumpkin seeds, goat cheese, and orange zest evenly into 4 serving bowls. Top with dressing before serving.