Preheat your oven to 425°F (220°C) and line a sheet pan with parchment paper.
In a small bowl, combine olive oil, lemon juice, minced garlic, dried herbs, salt, and pepper to create the marinade.
Place the chicken breast on one side of the sheet pan and drizzle half of the marinade over it, ensuring it is evenly coated.
In a separate bowl, toss the broccoli with the remaining marinade until well mixed.
Arrange the broccoli on the sheet pan beside the chicken, ensuring there's ample space for even roasting.
Roast in the preheated oven for 20-25 minutes, or until the chicken reaches an internal temperature of 165°F and the broccoli is tender with slight charred edges.
Meanwhile, prepare the quinoa according to package instructions if not already cooked.
Once the chicken and broccoli are done, serve them alongside the cooked quinoa for a balanced meal.