Brown hamburger w onion and Italian herbs. This is optional but recommended. You can add garlic if you like.

In a separate bowl add egg, cottage cheese, sour cream, spinach add 1/2 cup of Parmesan. Add red pepper flakes and salt and pepper. Also grate zest from one lemon. Mix together. Put mixture in a large gallon zip lock.. you this like a piping bag, snip off one end.

You are going to take filling and fill each tube, rigatoni w cheese. Set aside.

In your seasoned cast iron pan, add spaghetti sauce all over bottom of pan. Put filled rigatoni’s on this first layer of sauce. Sprinkle w a cup of mozzarella cheese, add more sauce on top. Add hamburger, and more cheese, then sauce then another layer of filled noodles. Repeat so you end w sauce then cheese mixture on top. Use all cheese on top. Add parsley to taste. Spray a piece on tinfoil and bake for 30 minutes or bubbling, I take foil off last 10 minutes.