Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper.
Dice the chicken breast, red bell pepper, and zucchini into uniform bite-sized pieces.
In a large bowl, toss the chicken and chopped vegetables with olive oil, turmeric, cumin, sea salt, and black pepper until evenly coated.
Spread the mixture in a single layer on the prepared baking sheet and roast for 18-20 minutes, or until the chicken is cooked through and the vegetables are tender.
Place the fresh spinach in the base of a serving bowl and top with the warm cooked quinoa.
Add the roasted chicken and vegetable mixture over the quinoa.
In a small ramekin, whisk together the tahini and lemon juice with a splash of water to reach a drizzling consistency.
Pour the tahini dressing over the bowl and serve immediately.