Preheat your oven to 400°F.
In a small bowl, whisk together lemon juice, olive oil, minced garlic, dried thyme, and dried rosemary.
Place the chicken breast in a baking dish and brush it generously with the lemon-herb mixture. Let it marinate for 10 minutes if time allows.
On a separate baking sheet, toss the broccoli and diced sweet potato with a drizzle of olive oil, salt, and pepper.
Place both the chicken and the vegetables in the preheated oven.
Roast the chicken for about 20-25 minutes until it reaches an internal temperature of 165°F. Roast the vegetables for about 25-30 minutes until tender and slightly crispy on the edges.
Once cooked, let the chicken rest for a few minutes before slicing, and plate with the roasted broccoli and sweet potatoes.
Enjoy your bright, flavorful, and balanced meal!