Preheat your oven to 400°F and line a large sheet pan with parchment paper for easy cleanup.
Cut the chicken breast into 1-inch bite-sized pieces and chop the broccoli and bell peppers into similar sizes to ensure even cooking.
In a small mixing bowl, whisk together the extra virgin olive oil, lemon juice, minced garlic, rosemary, thyme, sea salt, and black pepper.
Place the chicken, broccoli, and bell peppers onto the prepared sheet pan.
Drizzle the lemon-herb marinade over the chicken and vegetables, then toss thoroughly with your hands or tongs to coat every piece.
Spread the ingredients out into a single layer, ensuring the chicken pieces are not crowded together.
Roast in the oven for 18 to 22 minutes, or until the chicken is cooked through and the vegetables are tender with slightly caramelized edges.
Remove from the oven and serve immediately, garnishing with an extra squeeze of fresh lemon if desired.