Cook the ground beef until it is no longer pink. Once complete add the marinara sauce to the pan and let simmer.
In a pot of boiling salted water cook the pasta noodles according to their directions. Drain and let cool slightly until they can be handled.
In a bowl combine the ricotta cheese, about 2 cups of the mozzarella cheese, Italian seasoning, eggs, and salt and pepper. Stir until combined.
Take the 9x13 pan, lay down a layer of the meat and marinara sauce, only use about ½ of the sauce. Stuff the pasta shells with the cheese mixture and lay in a single layer on top of the marinara sauce.
Once the shells are stuffed and complete, cover with the rest of the marinara sauce and sprinkle with the rest of the mozzarella cheese on top.
Preheat your oven to 375℉. Cover the pan with tinfoil and place in oven to bake for 20 minutes covered. Then an additional 10-15 minutes uncovered to melt the cheese on top.
Remove and sprinkle with parsley. Serve warm and enjoy!