Preheat your oven to 400°F and line a large sheet pan with parchment paper for easy cleanup.
Peel the sweet potato and cut it into small 1/2-inch cubes to ensure they cook through at the same rate as the chicken.
Place the sweet potato cubes on the sheet pan, drizzle with olive oil, and sprinkle with half of the garlic powder, onion powder, salt, and pepper.
Roast the sweet potatoes alone for 10 minutes to give them a head start.
While the potatoes roast, cut the chicken breast into 1-inch bite-sized pieces and slice the red bell pepper into strips.
Remove the pan from the oven and add the chicken, broccoli florets, and bell peppers to the pan.
In a small bowl, whisk together the sweet chili sauce and coconut aminos, then pour the mixture over the chicken and vegetables.
Sprinkle the remaining seasonings over the top and toss everything together until evenly coated, spreading it out into a single layer.
Return the pan to the oven and bake for an additional 15-18 minutes, or until the chicken is cooked through and the sauce is bubbly.
For a final touch of texture, turn the broiler on for the last 2 minutes to get those edges slightly charred and crispy before serving.