In a large roasting dish, add 2 tablespoons avocado oil, balsamic vinegar, lemon juice, minced garlic, dried basil, oregano, thyme, salt, and pepper. Stir until well combined.
Add the zucchini, eggplant, bell peppers, and red onion to the dish.
Toss the vegetables until evenly coated with the marinade.
Roast for 15 minutes.
Remove from the oven, add the cherry tomatoes and remaining 1 tablespoon avocado oil, and stir.
Return to the oven and roast for an additional 15 minutes, or until vegetables reach your desired tenderness.
Remove from the oven and top with fresh parsley and basil before serving.