Preheat the oven to 425°F.
In a small bowl, mix together lemon juice, chopped rosemary, thyme, minced garlic, salt, and pepper. Brush the chicken breast with the mixture allowing it to marinate for at least 10 minutes.
Arrange the chicken breast on one side of a baking sheet.
In a separate bowl, toss broccoli, sliced zucchini, and red bell pepper with olive oil, salt, and pepper until evenly coated.
Spread the vegetables on the baking sheet next to the chicken, ensuring a single layer for even roasting.
Roast in the oven for about 20-25 minutes, or until the chicken reaches an internal temperature of 165°F and the vegetables are lightly crispy on the edges.
Remove from the oven, let rest for a few minutes, then serve and enjoy.