Baked Ziti

1-16oz. package of ziti
1 lb. ground beef
1-15oz. container of part skim ricotta cheese
1/2 cup grated Parmesan cheese
1 egg, whipped
salt and pepper to taste
1-45oz. jar of pasta sauce
1-16oz. bag of shredded Mozzerella cheese (yields 4 cups)

Prepare ziti, drain and set aside.  It needs to be cool when added to the other ingredients so it does not scramble the egg when combined!!! Brown the beef and drain well.  Let sit so it comes to room temp like the pasta.  In medium bowl mix together ricotta cheese, Parmesan cheese, egg, salt, pepper and 2 cups of the Mozzerella cheese.  In large bowl or pot (I just use the one I prepared the pasta in) mix together pasta, beef, cheese mixture and 2 cups of the pasta sauce.  Place into a greased 13x9 baking dish.  Sprinkle with 1 cup of Mozzerella cheese.  Spread remaining pasta sauce over the cheese and top with the last cup of Mozzerella cheese.  Bake for about 30 minutes or until bubbly.