Preheat the oven to 375 degrees. Now grease a pan and put it aside.
Cook the rigatoni based on the instructions on the back of the packet.
Now drain the spinach from the can and dry it with paper towels.
Take a bowl and add all the ingredients and mix it well.
Add the mixture into the greased pan and sprinkle some of the mozzarella cheese on top.
Bake it by covering it with foil for 35-50 minutes.