Preheat your oven to 425°F (220°C).
In a small bowl, whisk together olive oil, lemon juice, chopped fresh herbs, minced garlic, salt, and pepper to create the marinade.
Place the chicken breast in a baking dish and pour half of the marinade over the chicken, ensuring it is well coated.
Dice the sweet potato into cubes and toss with the remaining marinade along with the broccoli. Spread them on a baking sheet lined with parchment paper.
Roast the chicken in the oven for about 20-25 minutes or until the internal temperature reaches 165°F (74°C).
At the same time, roast the sweet potatoes and broccoli for 20 minutes, stirring halfway through, until the vegetables are tender and slightly crispy on the edges.
Once cooked, plate the roasted chicken alongside the crispy broccoli and sweet potatoes, and drizzle with any remaining pan juices if desired.
Serve warm and enjoy your nutritious, balanced meal.