cook pasta shells for 1 minute less than package directions

while cooking pre-heat the oven to 350˚

cook and drain the chopped spinach

lightly butter two 9X13 pans

spread 1 cup of pasta sauce in each 9X13 pan, set aside

mix the ricotta, 2 1/2 cups mozzarella, 1/2 cup of parmesan cheese, egg, drained spinach, salt, and pepper together

when shells are cooked drain and rinse in cool water

fill shells with a pastry bag-notes below OR a spoon, to use a spoon simply use a spoon to fill the shells, it's messier but doable-notes below

pour remaining sauce around shells OR over shells, your choice

sprinkle with remaining parmesan and mozzarella

cover and bake for 30 minutes