Preheat oven to 350 degrees.
Put water on stove to boil for cooking the pasta.
Once the water is boiling, cook pasta according to the package directions.
While you're waiting for the water to come to a boil, cook the sausage with the onion and bell pepper until the meat is thoroughly cooked and lightly browned.
Once the sausage is cooked, add pasta sauce, water, and tomato sauce to the pan with the meat mixture and stir well to combine.
Bring to mixture to a boil and reduce heat. Allow to simmer for 5 minutes
Place 1 cup pasta sauce in the bottom of a 9X13 inch pan.
Now, you will begin layering the baked rigatoni dish into the baking dish
Place one-half of the cooked rigatoni on top of the sauce.
Sprinkle one cup shredded Mozzarella and 1 cup shredded Parmesan cheese evenly on top of the noodles.
Evenly distribute two cups of the meat and pasta sauce mixture on top of the cheese.
Spread the remaining pasta on top of the sauce.
Add the remaining cup of Mozzarella cheese evenly distributed on top of the pasta.
Finish the dish by carefully spreading the remaining meat sauce over the top of the cheese.
Bake in a 350 degree oven for 30 - 45 minutes.
Remove from oven and allow to rest for 10 minutes before serving.