In a skillet heat the olive oil. Add the chicken season with salt and pepper. Cook until no longer pink about 4 to 5 minutes. Remove from the skillet and set aside.
Cook the rigatoni pasta for a minute or two according to the directions on the box.
Add the green pepper, onion, and garlic and cook until softened. Add the diced tomatoes and tomato sauce and stir in.
Stir in the parmesan cheese, oregano, basil, and parsley. Add the cream and mix in. Season with salt and pepper if desired.
Add the chicken back into the skillet along with the cooked pasta. Stir until well combined.
Sprinkle the mozzarella cheese over top of the casserole.
Transfer to a casserole dish. Bake in a preheated 375 degrees F oven for 25 to 30 minutes.