Step 1

In a large bowl mix together the ricotta cheese, spinach, 1½ cups mozzarella cheese and egg. Spoon the cheese mixture into your shells.

Step 2

Spread a layer of sauce on the bottom of the slow cooker and place stuffed shells on top. It's okay to stack the shells.

Step 3

Pour layer the cooked ground meat over the shells, then spread the remaining sauce on top. Cover and cook on low for 3 - 4 hours, until bubbly and heated though.

Step 4

About 30 minutes before you're ready to eat, top with the remaining shredded mozzarella. Cover and continue cooking until cheese is melted.

Step 5

Serve with Italian parsley and parmesan cheese.