Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper.
Rinse the dry quinoa under cold water and place it in a small saucepan with 0.5 cup of water. Bring to a boil, then reduce heat to low, cover, and simmer for 15 minutes or until water is absorbed.
While the quinoa cooks, dice the chicken breast, red bell pepper, and zucchini into bite-sized pieces.
Place the chicken and vegetables on the prepared baking sheet. Drizzle with olive oil and season with sea salt, black pepper, and garlic powder. Toss to coat evenly.
Roast in the oven for 18-20 minutes, or until the chicken is cooked through and the vegetables are tender and slightly caramelized.
In a large mixing bowl, fluff the cooked quinoa with a fork. Add the roasted chicken, vegetables, lemon juice, lemon zest, and fresh parsley.
Toss everything together until well combined and serve warm.