Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper for easy cleanup.
Slice the chicken breast into even 1-inch strips to ensure they cook at the same rate as the vegetables.
Chop the zucchini into half-moons, slice the bell pepper into strips, and cut the red onion into small wedges.
In a large mixing bowl, whisk together the olive oil, minced garlic, dried oregano, dried thyme, sea salt, and black pepper.
Add the chicken strips, zucchini, bell pepper, and red onion to the bowl, tossing thoroughly until everything is well-coated in the herb oil.
Spread the chicken and vegetable mixture in a single layer on the prepared baking sheet, leaving space for the cherry tomatoes later.
Roast in the oven for 15 minutes.
Carefully remove the pan, add the cherry tomatoes, and give everything a quick toss.
Return to the oven for another 10 minutes, or until the chicken is cooked through and the vegetables are tender with slightly charred edges.
Finish with a fresh squeeze of lemon juice over the entire pan before serving warm.