Preheat your oven to 400°F (200°C) and line a small baking sheet with parchment paper.
Place the chicken breast and broccoli florets on the baking sheet.
Drizzle with olive oil and sprinkle with turmeric, garlic powder, sea salt, and black pepper, tossing well to coat the chicken and vegetables evenly.
Roast in the oven for 18 to 22 minutes, or until the chicken reaches an internal temperature of 165°F and the broccoli is tender and slightly charred.
While the chicken roasts, prepare the dressing by whisking together the tahini and lemon juice in a small bowl, adding a teaspoon of warm water at a time until a smooth, pourable consistency is reached.
Slice the roasted chicken into strips.
Assemble the bowl by placing the warm cooked quinoa at the base, topping it with the roasted chicken and broccoli, and finishing with a drizzle of the creamy lemon-tahini sauce.