Preheat your oven to 400°F (200°C).
In a small bowl, combine lemon juice, fresh herbs, salt, and pepper to create a marinade.
Pat the chicken breast dry and rub the lemon-herb mixture all over it. Let it sit for 10-15 minutes to absorb the flavors.
Toss the broccoli florets with olive oil, salt, and pepper on a baking sheet.
Place the chicken breast on a separate baking tray or alongside the broccoli if space allows.
Roast both the chicken and broccoli in the preheated oven. Roast the chicken for about 20-25 minutes, until it reaches an internal temperature of 165°F (74°C), and roast the broccoli for 15-20 minutes until it is tender and crispy around the edges.
While the chicken and broccoli are roasting, prepare the quinoa according to package instructions. Typically, bring 1 part quinoa to 2 parts water to a boil, then simmer until the water is absorbed and the quinoa is fluffy.
Plate the cooked quinoa, sliced roasted chicken, and crispy broccoli. Drizzle any remaining lemon-herb mixture over the plate for an extra burst of flavor.
Serve warm and enjoy your balanced, protein-packed meal.