Preheat your oven to 425°F.
Peel and dice the sweet potato into 1-inch cubes. Toss with half the olive oil, a pinch of salt, and pepper.
Place the sweet potatoes on a baking sheet lined with parchment paper and roast for about 20-25 minutes until tender and slightly crispy.
While the sweet potatoes roast, pat the chicken breast dry. Brush with the remaining olive oil and season generously with garlic powder, mixed herbs, salt, and pepper.
Heat a skillet over medium-high heat. Sear the chicken breast for 2-3 minutes on each side until golden brown.
Transfer the chicken to the oven alongside the sweet potatoes and roast for an additional 10-12 minutes, or until the internal temperature reaches 165°F.
Trim the ends of the green beans, then steam or lightly blanch them for about 3-4 minutes until crisp-tender. Season lightly with salt and pepper.
Plate the roasted sweet potatoes, herb-crusted chicken, and green beans together. Enjoy your balanced and flavorful meal!