Preparation

• Preheat the Oven - Set the oven rack to the middle position. Preheat the oven to 375°F (190ºC).
• Saute the Aromatics - In a large pan, heat olive oil over medium-low heat and sauté onion, garlic, and Italian seasoning until translucent, about 3 minutes.
• Brown the Meat - Turn the heat to medium-high, and add the beef and sausage to the pan. Break the meat into smaller pieces and cook until no traces of pink remain, about 5 minutes. Season with 1 ½ teaspoon salt and ½ teaspoon black pepper.
• Simmer the Sauce - Add the tomato paste and stir until combined. Cook for 1 minute. Add in crushed tomatoes and simmer over medium-low heat, stirring occasionally, for 30 minutes. Taste and season with more salt and pepper as desired.
• Boil the Pasta - Bring water and 1 tablespoon salt to a boil. Cook the lasagna according to package directions, occasionally stirring to prevent sticking, until al dente, about 8 minutes. Carefully remove the pasta and transfer it to a sheet pan lined with clean kitchen towels. Place them in a single layer to keep them from sticking together. Set aside until ready to use.
• Make the Cheese Mixture - In a medium-sized bowl, whisk together eggs, ricotta cheese, parmesan cheese, ½ teaspoon salt, ¼ teaspoon pepper, and chopped parsley.
• Prep the Baking Dish - Reserve about 1 cup of sauce and 1 cup of grated mozzarella cheese for topping the lasagna. Lightly coat a 13 x 9-inch baking dish with oil. Add enough sauce to lightly cover the bottom of the dish to prevent sticking.
• Layer the Lasagna - Layer 3 to 4 sheets of lasagna, top with ⅓ of the ricotta cheese mixture, ⅓ meat sauce, and ⅓ of the mozzarella cheese. Repeat for 2 more layers. On the top layer, pour the reserved sauce and cover evenly with the reserved mozzarella cheese.
• Bake the Casserole - Line a sheet tray with foil and place the baking dish on top. Loosely cover the dish with foil, making sure not to touch the cheese. Bake for 30 minutes, then remove the foil. Continue baking until the cheese is hot and bubbly, about 15 minutes. The lasagna can be broiled for a few minutes for an extra browned crust.
• Let it Cool - Before slicing and serving, allow the lasagna to rest for 15 minutes.