Creating Maple Dijon Chicken with Roasted Sweet Potatoes is straightforward if you follow these clear steps:

1. Preheat the Oven: Preheat your oven to 400°F (200°C).
2. Prepare the Sweet Potatoes: In a large bowl, toss the diced sweet potatoes with 1 tablespoon of olive oil, salt, and pepper. Spread them in a single layer on a baking sheet.
3. Bake the Sweet Potatoes: Place the baking sheet in the preheated oven and bake for 20 minutes, stirring halfway through.
4. Make the Glaze: While the sweet potatoes bake, whisk together the Dijon mustard, maple syrup, garlic powder, salt, and pepper in a medium bowl.
5. Prepare the Chicken: In a separate bowl, coat the chicken breasts with the remaining tablespoon of olive oil. Season with salt and pepper.
6. Glaze the Chicken: Brush the maple-Dijon mixture over the chicken breasts, ensuring they are evenly coated.
7. Add Chicken to the Oven: After the sweet potatoes have baked for 20 minutes, add the glazed chicken breasts to the baking sheet. Bake for an additional 20-25 minutes, or until the chicken is cooked through and reaches an internal temperature of 165°F (75°C).
8. Combine and Serve: Once both the chicken and sweet potatoes are done, remove them from the oven. Let the chicken rest for a few minutes before slicing.
9. Garnish: Serve the maple Dijon chicken over the roasted sweet potatoes, garnished with fresh parsley if desired.