Preheat your oven to 400°F (200°C).
Pat the chicken breast dry using a paper towel. In a small bowl, combine lemon juice, olive oil, minced garlic, dried thyme, dried rosemary, salt, and pepper.
Rub the herb mixture evenly over the chicken breast, coating both sides.
Place the seasoned chicken breast on a baking sheet lined with parchment paper.
In a separate bowl, toss the broccoli florets with a pinch of salt, pepper, and a drizzle of olive oil if desired for extra crispiness.
Arrange the broccoli around the chicken on the baking sheet.
Roast in the preheated oven for 20-25 minutes, or until the chicken reaches an internal temperature of 165°F (74°C) and the broccoli is tender with crispy edges.
Remove from the oven, let the chicken rest for a few minutes, then slice and serve alongside the roasted broccoli.