Creating this Slow Cooker Baked Ziti is straightforward when you follow these simple steps:

1. Cook the Meat: In a skillet, brown the ground beef or Italian sausage over medium heat until fully cooked. Drain excess fat and set aside.
2. Prepare the Pasta: Cook the ziti pasta according to package instructions until al dente. Drain and set aside.
3. Mix the Cheese Filling: In a large bowl, combine ricotta cheese, egg, Italian seasoning, salt, and pepper. Mix until well combined.
4. Layer the Ingredients: In the slow cooker, spread a thin layer of marinara sauce on the bottom. Then add half of the cooked ziti, followed by half of the meat mixture, and dot with half of the ricotta mixture. Top with a sprinkle of mozzarella and Parmesan cheese.
5. Repeat Layers: Add another layer of marinara sauce, the remaining ziti, the rest of the meat, and the remaining ricotta mixture. Finish with the remaining marinara sauce and a generous layer of mozzarella and Parmesan cheese on top.
6. Cook: Cover and cook on low for 4 to 6 hours or on high for 2 to 3 hours, until the cheese is melted and bubbly.
7. Serve: Once cooked, garnish with fresh basil or parsley if desired, and serve hot.

These steps will ensure you create a delicious Slow Cooker Baked Ziti that is sure to impress!