Preheat the oven to 400°F and line a large baking sheet with parchment paper for easy cleanup.
Dice the zucchini, red bell pepper, and red onion into uniform 1-inch pieces to ensure even roasting.
Mince the garlic cloves finely.
In a large mixing bowl, combine the chicken breast and chopped vegetables, then drizzle with extra virgin olive oil.
Sprinkle the dried oregano, dried thyme, sea salt, and black pepper over the mixture, tossing well to coat every piece.
Spread the chicken and vegetables in a single layer on the prepared baking sheet, ensuring they aren't crowded so they roast rather than steam.
Roast for 20 to 25 minutes, or until the chicken is cooked through and the vegetables are tender with slightly charred edges.
Remove from the oven and immediately drizzle with fresh lemon juice to brighten the savory herb flavors.