I cooked the shells per the instructions on the package. While they were draining and cooling I browned up some sweet Italian sausage (1 lb). When the sausage was cooked I drained off the grease and put it into a large bowl. To the sausage I added 3 cups of grated mozzarella cheese, 1 lb of ricotta cheese, 3 cloves of minced garlic and 1 can of chopped spinach which I had squeezed all the water out of. Then I stuffed the shells.
After I had all the shells stuffed I covered them with spaghetti sauce, I used two cans. I then sprinkled them with Parmesan cheese and baked them at 350 until the sauce was bubbling around the edges.
When I pulled them out the Parmesan cheese was a little golden brown in spots.
After we ate I had a lot of shells leftover so I packaged them into meal size portions and froze them for future use.
I used:
1 can of chopped spinach
2 cans of Hunts Spaghetti sauce with garlic