Chicken Broccoli Ziti

Name: Chicken Broccoli Ziti
Ingredients: 1 pound boneless skinless chicken breasts, cut into 1/2-inch strips; 1/2 teaspoon pepper; 1/4 teaspoon salt, divided; 2 tablespoons butter, divided; 1 small onion, chopped; 3 garlic cloves, minced; 1/4 teaspoon crushed red pepper flakes; 1/4 teaspoon dried oregano; 2 cups reduced-sodium chicken broth; 1 cup fat-free milk; 2-1/2 cups uncooked ziti; 1 bunch broccoli, cut into florets; 1 cup julienned roasted sweet red peppers; 1/2 cup grated Parmesan cheese