Preheat your oven to 425°F and line a sheet pan with parchment paper.
In a small bowl, mix the juice of 1/2 a lemon, olive oil, chopped fresh herbs, minced garlic, salt, and pepper.
Place the 4 ounces chicken breast on the sheet pan and brush both sides with the lemon herb mixture.
Peel and cube the sweet potato into bite-sized pieces and add them to the pan. Drizzle a little extra olive oil and season lightly with salt and pepper.
Cut the broccoli into florets and add them to the pan, ensuring even distribution.
Toss the vegetables gently so they are coated with the herb mixture, then place the sheet pan in the preheated oven.
Roast for 20-25 minutes, turning the vegetables halfway through, and ensuring the chicken is fully cooked with an internal temperature of 165°F.
Serve hot, and enjoy your nutritious and flavorful one-pan meal!