Preheat your oven to 400°F and line a baking sheet with parchment paper.
Peel and cube the sweet potato into half-inch pieces.
In a bowl, toss the sweet potato cubes with half of the olive oil, cumin, and a pinch of salt and pepper.
Spread the sweet potatoes on the baking sheet and roast for 20 to 25 minutes until tender and slightly browned.
Season the chicken breast with garlic powder and the remaining salt and pepper.
Grill or pan-sear the chicken over medium heat for 6 to 7 minutes per side until the internal temperature reaches 165°F.
Let the chicken rest for 5 minutes before slicing it into thin strips.
Rinse and drain the black beans thoroughly.
Place the baby spinach in a large bowl and top with the roasted sweet potatoes, black beans, and sliced chicken.
Drizzle the entire bowl with lime juice and the remaining olive oil before serving.