Preheat your oven to 425°F.
In a bowl, combine olive oil, lemon juice, garlic powder, cumin, paprika, turmeric, salt, and pepper to create a shawarma-style marinade.
Toss the chicken breast in the marinade ensuring it’s fully coated. Let it marinate for at least 15 minutes.
While the chicken marinates, prepare the vegetables by tossing the diced red bell pepper, sliced zucchini, and red onion in a light drizzle of olive oil, salt, and pepper.
Place the vegetables on a baking sheet and roast in the oven for 20 minutes, or until tender and slightly charred.
Cook the marinated chicken by either grilling or baking it in a preheated oven at 425°F for about 18-20 minutes, until fully cooked and juices run clear.
Meanwhile, prepare the quinoa as per package instructions if not already cooked.
Assemble the bowl by placing a base of quinoa, layering on the roasted vegetables, and topping with sliced chicken breast.
Garnish with a sprinkle of extra herbs or a squeeze more of lemon juice if desired, and serve warm.