Preheat your oven to 400°F and line a large baking sheet with parchment paper.
Peel the sweet potato and cut it into half-inch cubes, then dice the chicken breast into similar bite-sized pieces.
Place the sweet potato and chicken on the baking sheet and drizzle with olive oil.
Sprinkle the sea salt, black pepper, cumin, and garlic powder over the chicken and potatoes, tossing well to coat evenly.
Spread the mixture in a single layer and roast for 20 to 25 minutes until the potatoes are tender and the chicken is fully cooked.
While roasting, rinse and drain the black beans thoroughly.
Place the fresh baby spinach in a large serving bowl.
Add the warm roasted chicken, sweet potatoes, and black beans directly onto the spinach.
Toss the ingredients gently so the residual heat from the oven slightly wilts the spinach before serving.