Chop sage leaves into thin strips (3 tablespoons).
Chop red peppers.
Cook pasta following package instructions.
Preheat large sauté pan on medium-high 2–3 minutes. Place oil in pan, then add mushrooms; cook 2–3 minutes or until browned. Add chopped red peppers and chicken strips; cook 1–2 minutes to heat.
Reduce heat to medium-low. Stir in broth and Alfredo sauce; simmer 3–4 minutes or until mixture has thickened. Stir in pasta, prosciutto, sage, and pepper. Top with Parmesan cheese and serve.