Creating a Stuffed Italian Meatloaf is straightforward when you follow these steps:

1. Preheat Oven: Preheat your oven to 350°F (175°C).
2. Sauté Vegetables: In a skillet over medium heat, heat the olive oil. Add the onions, bell peppers, and garlic, and sauté until softened (about 5 minutes). Remove from heat and let cool slightly.
3. Mix Meatloaf Ingredients: In a large mixing bowl, combine ground beef, Italian breadcrumbs, Parmesan cheese, sautéed vegetables, parsley, oregano, salt, pepper, and eggs. Mix until just combined; do not overmix.
4. Form Meatloaf: On a piece of parchment paper or plastic wrap, form the meat mixture into a rectangle (about 10×8 inches).
5. Add Filling: Spread the shredded mozzarella cheese evenly over the meat rectangle. Then, spoon some marinara sauce over the cheese.
6. Roll It Up: Carefully roll the meat mixture away from you into a log format, making sure to tuck in the sides to seal the stuffing inside.
7. Place in Baking Dish: Transfer the rolled meatloaf to a greased baking dish, seam side down.
8. Top with Marinara: Spoon additional marinara sauce over the top of the meatloaf for added flavor and moisture.
9. Bake: Bake in the preheated oven for 45-50 minutes or until the internal temperature reaches 160°F (70°C).
10. Rest and Slice: Remove from the oven and allow the meatloaf to rest for 10-15 minutes before slicing.

These steps will ensure you’re set up for success in creating a mouthwatering Stuffed Italian Meatloaf that everyone will love.