Preheat your oven to 400°F and cook the whole grain pasta according to package directions until al dente.
Toss the diced zucchini and bell peppers with olive oil, sea salt, and black pepper on a parchment-lined baking sheet.
Season the chicken breast with a pinch of salt and pepper, then place it on the baking sheet with the vegetables.
Roast for 15-20 minutes until the chicken is cooked through and the vegetables are tender and slightly caramelized.
Slice the roasted chicken into bite-sized pieces and set aside.
In a large mixing bowl, whisk together the Greek yogurt and garlic powder, adding a tablespoon of pasta water if needed to reach a smooth consistency.
Fold the cooked pasta, roasted vegetables, and chicken into the yogurt sauce until evenly coated.
Transfer the mixture to a small baking dish, sprinkle with parmesan cheese, and broil for 2-3 minutes until the top is golden and bubbly.
Garnish with freshly chopped parsley and serve immediately.