Grease a 13-inch x 9-inch baking dish. Cook the pasta as directed on the package, adding the bell pepper during the last three minutes of cook time. Drain the pasta and return it to the saucepan.
Meanwhile, cook the broccoli and cheese sauce as directed on the package. Stir the cooked broccoli mixture, chicken, milk and cayenne pepper into the pasta. Pour the pasta mixture into the baking dish.
In a small bowl, stir together the bread crumbs, Parmesan cheese and Italian seasoning; stir in the olive oil using a fork. Sprinkle the bread crumb mixture over the top of the pasta mixture.
Bake for 15-20 minutes, or until the top is golden brown and the pasta is hot.