Heat 2 Tbsp oil a 12-inch non-stick skillet over medium heat. Add sweet potatoes, saute 3 minutes. Cover and let cook until nearly softened, stirring occasionally, about 8 - 10 minutes (this is where I prep some of the other ingredients to make the most of my time).
Add in onion and garlic and saute (uncovered), 1 minute. Add in black beans, corn, 1 tsp chili powder, 1 tsp cumin, cayenne pepper and season with salt and pepper to taste. Let cook, stirring frequently, until corn is heated through and potatoes are soft, about 2 minutes longer. Transfer to a large plate.
Heat remaining 1 Tbsp oil in same skillet over medium-high heat. Add chicken, season with remaining 1 tsp chili powder, 1 tsp cumin and salt and pepper. Cook, turning once halfway through, until chicken is cooked through (center should register 165 degrees), about 6 - 7 minutes.
Meanwhile, in a small bowl whisk together lime juice and honey. Return sweet potato mixture to skillet once chicken is cooked through, along with tomatoes and avocado. Add honey lime mixture and cilantro and toss to coat. Serve immediately over brown rice if desired and sprinkle with Queso Fresco if desired.
