Vegetable oil cooking spray
1 pound boneless, skinless chicken breasts
1 zucchini, sliced lengthwise
1 yellow squash, sliced lengthwise
1 red bell pepper, sliced lengthwise
2 large portobello mushroom caps
1/2 pound whole-grain fettuccine
4 tablespoons olive oil, divided
3 tablespoons cornstarch
1 small onion, diced
3 cloves garlic, crushed
2 cups fat-free half-and-half
1 cup low-sodium chicken broth
1 cup grated Parmesan, divided
1/2 cup plain nonfat Greek yogurt
1 jar (6 ounces) artichoke hearts, drained and quartered
2 tablespoons fresh parsley