Preheat your oven to 400°F and line a large rimmed baking sheet with parchment paper for easy cleanup.
Pat the chicken breast dry with paper towels and cut into uniform 1-inch cubes.
Rinse and drain the chickpeas, then pat them thoroughly dry to ensure they achieve a crispy texture in the oven.
Slice the bell pepper and zucchini into bite-sized pieces, keeping them roughly the same size as the chicken.
In a large mixing bowl, combine the chicken, chickpeas, peppers, and zucchini.
Drizzle with olive oil and sprinkle with garlic powder, smoked paprika, sea salt, and black pepper, tossing until everything is evenly coated.
Spread the mixture in a single layer on the prepared baking sheet, ensuring the pieces aren't overcrowded.
Roast for 18-20 minutes, or until the chicken is cooked through and the chickpeas are slightly golden and crunchy.
Place the warm, pre-cooked quinoa in the bottom of a bowl and top with the roasted chicken and vegetable mixture.
Finish the dish with a bright drizzle of fresh lemon juice and a sprinkle of chopped parsley.