Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper.
Pat the chicken breast dry with paper towels and season both sides evenly with sea salt, black pepper, garlic powder, rosemary, and thyme.
Place the broccoli florets on one side of the baking sheet, drizzle with half of the olive oil and a pinch of salt, tossing to coat.
Place the seasoned chicken breast on the other side of the baking sheet and drizzle with the remaining olive oil.
Roast in the center of the oven for 20-25 minutes, or until the chicken reaches an internal temperature of 165°F and the broccoli is tender and slightly charred.
While the chicken rests for 5 minutes, warm your pre-cooked quinoa in a small pan or bowl.
Slice the chicken into strips and serve over the fluffy quinoa alongside the roasted broccoli.
Finish the dish with a fresh squeeze of lemon juice over the chicken and vegetables for a bright, clean flavor.