Preheat your oven to 425°F (220°C).
Chop the bell pepper, zucchini, and red onion into bite-sized pieces. Toss them in a bowl with olive oil, garlic powder, salt, and pepper.
Spread the vegetables on a baking sheet lined with parchment paper and roast in the preheated oven for about 20-25 minutes, stirring halfway through for even cooking.
While the vegetables roast, heat a pan over medium heat. Add the ground turkey, seasoning lightly with salt and pepper, and cook until fully browned and cooked through, about 6-8 minutes.
Warm the cooked quinoa if needed, either in a microwave or in a small pot over medium heat.
Assemble your bowl by adding quinoa as the base, topping it with the cooked ground turkey and then the roasted vegetables.
Serve warm and enjoy this balanced meal that's perfect for breakfast, lunch, or dinner.