Preheat the oven to 375F / 190C. Lay the beets on a foil lined baking sheet. Drizzle with oil and season with salt and pepper. Bake in the oven until tender. (Easily pierce with a fork). Then set aside to cool.
Preheat the grill to medium heat.
Season the chicken breasts with salt and black pepper. Drizzle with olive oil.
Grill the chicken on both sides until cooked through (internal temperature should reach 160°F / 71°C). Remove from the grill and let rest for 5 minutes before slicing.
Portion the arugula, roasted beets, crumbled goat cheese, candied walnuts, and chicken.
Drizzle the dressing over the salad.
Mojito: Stir together all ingredients until well combined. Taste and adjust the lime or honey as needed.
Serve immediately and enjoy your delicious salad with mojito.