Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper.
Cut the chicken breast into 1-inch cubes and chop the broccoli and red bell pepper into bite-sized pieces.
Place the chicken and vegetables on the baking sheet, drizzle with olive oil, and season with garlic powder, sea salt, and black pepper.
Roast for 15-18 minutes until the chicken is fully cooked and the vegetables are tender with slightly charred edges.
While the tray roasts, cook the chickpea pasta in a pot of boiling water for 1 minute less than the package instructions, reserving 2 tablespoons of the starchy cooking water.
In a mixing bowl, whisk the Greek yogurt, nutritional yeast, and reserved pasta water until a creamy, smooth consistency is achieved.
Combine the cooked pasta, roasted chicken, and vegetables in the bowl, tossing thoroughly to coat every piece in the sauce.
Transfer the mixture to a small oven-safe dish, top with parmesan cheese, and broil for 2 minutes until the cheese is melted and golden brown.