Preheat your oven to 400°F and line a large baking sheet with parchment paper for easy cleanup.
Peel and dice the sweet potato into uniform 1/2-inch cubes to ensure even roasting.
Toss the sweet potato cubes with 0.25 tablespoons of olive oil and a pinch of sea salt on the prepared baking sheet.
Roast the sweet potatoes for 20 to 25 minutes until they are tender and the edges are slightly caramelized.
While the potatoes roast, dice the chicken breast into bite-sized pieces and season thoroughly with garlic powder, smoked paprika, sea salt, and black pepper.
Heat the remaining 0.5 tablespoons of olive oil in a large cast-iron or non-stick skillet over medium-high heat.
Add the chicken to the skillet and sauté for 5 to 7 minutes until golden brown and cooked through, then remove and set aside.
In the same skillet, add the diced red onion and bell pepper, sautéing for 4 minutes until the vegetables are softened and fragrant.
Lower the heat to medium and stir the roasted sweet potatoes and cooked chicken back into the skillet.
Add the chopped kale and toss everything together for 2 minutes until the kale is wilted and the flavors are perfectly combined.