Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper.
Chop the bell pepper and zucchini into bite-sized pieces and slice the chicken breast into thin strips.
Place the chicken and vegetables on the baking sheet, drizzle with olive oil, and sprinkle with sea salt, black pepper, and garlic powder.
Toss everything together until evenly coated, then spread in a single layer.
Roast for 18 to 20 minutes, or until the chicken is cooked through and the vegetables are tender and slightly charred.
In a large bowl, combine the cooked quinoa, roasted chicken, and vegetables.
Add the lemon juice, lemon zest, and fresh parsley, then toss well to combine all the flavors before serving.