Preheat your oven to 400°F.
In a bowl, combine the lean ground turkey, egg, whole wheat bread crumbs, chopped fresh parsley, minced garlic, and dried oregano. Season with salt and pepper to taste.
Gently mix all the ingredients until just combined, being careful not to overwork the mixture.
Shape the mixture into evenly sized meatballs, about 1 to 1.5 inches in diameter, and place them on a lightly greased baking sheet.
In a separate bowl, toss the chopped zucchini, red bell pepper, and red onion with olive oil, salt, and pepper.
Spread the vegetables around the meatballs on the baking sheet.
Bake in the preheated oven for about 20-25 minutes, or until the meatballs are cooked through and the vegetables are tender with slight browning.
Serve warm, and enjoy your balanced, herb-seasoned turkey meatballs paired with nutrient-rich roasted vegetables.