At our house we live with two dogs and a crazy German barn cat.
Jackson the gooberhead Golden retriever
According to AllRecipes.com, this is the Web site's most popular recipe and possibly the most viewed among English-language sites. We tested it with a few tweaks to reduce the sodium, as recommended by many comments attached to the original recipe.
MAKE AHEAD: You'll have leftover sauce, which can be refrigerated for up to 3 days or frozen for up to 3 months. The unbaked lasagna can be refrigerated for up to 2 days, or it can be wrapped well and frozen for up to 3 months. Defrost in the refrigerator before baking.
Heat the sausage in a large Dutch oven over medium-high heat. Cook for 4 to 6 minutes, using a spatula to break up any large clumps, until the meat is browned with no trace of pink. If desired, drain and discard the fat. Add the ground beef, onion and garlic, stirring to combine; cook until the beef is thoroughly browned and the onion has softened, breaking up any clumps as needed.
Stir in the crushed tomatoes and their juices, tomato paste, tomato sauce and water, then add the sugar, basil, fennel seed, Italian seasoning blend, 1 1/2 teaspoons of the salt, the pepper and half of the parsley, stirring to incorporate. Cover and cook for about 1 1/2 hours, stirring occasionally. The yield is about 6 1/2 cups.
Meanwhile, bring a large pot of water to a boil over high heat. Add a generous pinch of salt and then the lasagna. Cook not quite as long as the package directions indicate, so the noodles are al dente. Drain and rinse under cool water; separate them and lay them on a clean surface.
Combine the ricotta, egg, the remaining parsley and the remaining 1/2 teaspoon of salt in a mixing bowl until well incorporated.
Preheat the oven to 375 degrees. Have a 9-by-13-inch baking dish at hand.
Spread 1 1/2 cups of the sauce evenly over the bottom of the baking dish, then arrange half of the cooked lasagna noodles lengthwise so they completely cover the sauce, overlapping them a bit. Use an offset spatula to spread half of the ricotta mixture over the noodles, then use half of the mozzarella slices to completely cover the ricotta layer. Spread 1 1/2 cups of the sauce over the mozzarella, then scatter half of the Parmigiano-Reggiano evenly over the sauce.
Next, repeat the layers using the remaining lasagna noodles, the remaining ricotta mixture and the remaining mozzarella slices. Top with 1 1/2 cups of the sauce, spreading it to cover the mozzarella, then scatter the remaining Parmigiano-Reggiano cheese evenly over the sauce.
Use cooking oil spray to coat the underside of a piece of aluminum foil large enough to cover the lasagna; seal the foil tightly around the edges of the baking dish. Bake for 25 minutes, then remove the foil and bake for 25 minutes so the lasagna’s top layer of cheese is nicely browned on top.
Cool for 15 minutes before serving. If desired, garnish with parsley and Parmigiano-Reggiano cheese.
Adapted from a recipe by AllRecipes.com member John Chandler of Dallas and from its accompanying AllRecipes.com video.