Preheat your oven to 400°F.
In a mixing bowl, combine the lean ground turkey, egg, chopped fresh parsley, oregano, and minced garlic. Season with salt and pepper.
Form the mixture into small meatballs, roughly 1 to 1.5 inches in diameter, and place them on a lightly greased baking sheet.
Chop the zucchini into half-moons, slice the bell pepper into strips, halve the cherry tomatoes, and thinly slice the red onion.
Toss the vegetables with olive oil, salt, and pepper, and spread them out on a separate baking sheet.
Place both baking sheets in the preheated oven. Roast the vegetables for about 20-25 minutes until they become tender and slightly caramelized.
At the same time, bake the turkey meatballs for 18-20 minutes or until they are firm and fully cooked through, turning once midway.
Once cooked, plate the turkey meatballs alongside a generous serving of roasted vegetables. Enjoy while warm!