- Preheat Oven:
- Preheat your oven to 350°F (175°C). Grease a 9×13-inch baking dish.
- Cook Manicotti:
- Cook the manicotti shells according to the package instructions. Drain and set aside.
- Cook Sausage Mixture:
- In a large skillet over medium heat, cook the Italian sausage, breaking it up with a spoon as it cooks. Once browned, add chopped onion and minced garlic. Cook until the onion is softened.
- Season and Add Tomatoes:
- Stir in dried oregano, dried basil, red pepper flakes (if using), crushed tomatoes, and drained diced tomatoes. Season with salt and black pepper to taste. Simmer for about 10 minutes to let the flavors meld.
- Prepare Filling:
- In a bowl, mix together ricotta cheese, shredded mozzarella, grated Parmesan, and a beaten egg. Season with salt and pepper.
- Fill Manicotti:
- Carefully stuff each cooked manicotti shell with the ricotta mixture.
- Assemble Casserole:
- Spread a thin layer of the sausage and tomato mixture in the bottom of the greased baking dish. Place the stuffed manicotti shells on top.
- Top with Sauce:
- Pour the remaining sausage and tomato mixture over the top of the stuffed manicotti, ensuring they are well-covered.
- Bake:
- Cover the baking dish with foil and bake in the preheated oven for about 25-30 minutes or until the casserole is hot and bubbly.
- Garnish and Serve:
- Garnish with chopped fresh parsley before serving. Serve the Sausage Manicotti Casserole hot.
This casserole is a delicious twist on classic manicotti, and the addition of Italian sausage adds a savory flavor to the dish. Enjoy your comforting and hearty meal!