Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper.
Combine the dry quinoa with 0.5 cup of water in a small saucepan, bring to a boil, then reduce heat to low, cover, and simmer for 15 minutes until liquid is absorbed.
While the quinoa cooks, dice the chicken breast into one-inch cubes and chop the broccoli and red bell pepper into bite-sized pieces.
Place the chicken, broccoli, and bell pepper on the prepared baking sheet and drizzle with the extra virgin olive oil.
Add the minced garlic, sea salt, and black pepper to the tray, tossing everything thoroughly to ensure an even coating.
Roast in the oven for 18 to 20 minutes, or until the chicken is cooked through and the vegetables are slightly caramelized.
Fluff the cooked quinoa with a fork and stir in the fresh lemon juice and lemon zest.
Transfer the roasted chicken and vegetables into the quinoa pot, folding gently to combine.
Garnish with chopped fresh parsley and serve immediately while warm.