In a small bowl, combine the olive oil, dried oregano, dried thyme, garlic powder, and a generous pinch of salt and pepper to create a herb mixture.
Pat the chicken thighs dry with paper towels and rub the herb mixture all over the chicken, ensuring to get it under the skin for maximum flavor.
In a large mixing bowl, toss together the carrots, zucchini, red bell pepper, red onion, and whole garlic cloves with a drizzle of olive oil, salt, and pepper until well coated.
Spread the vegetables evenly on a large roasting pan and place the herb-coated chicken thighs on top.
Squeeze the fresh lemon juice over the chicken and veggies for an added zing.
Roast in the preheated oven for 35-40 minutes, or until the chicken is golden brown and cooked through (internal temperature should reach 165°F/75°C) and the vegetables are tender.
Let the dish rest for 5 minutes before serving.
Garnish with freshly chopped parsley before serving for a pop of color and freshness.
Notes
Ensure to rub the herb mixture under the skin for maximum flavor.