Cook the meat sauce

• Brown the ground beef in a frying pan until fully cooked.
• Stir in the marinara sauce and season with salt and black pepper.

Mix the cheese filling

• Combine the ricotta, egg, half of the mozzarella and the parmesan in a mixing bowl.
• Season with salt and black pepper and mix until smooth.

Layer the lasagna

• Spread a little meat sauce in the bottom of the baking dish.
• Alternate layers of dry lasagna sheets, meat sauce and cheese filling, finishing with the remaining mozzarella.

Seal and cook in the dishwasher

• Cover the baking dish tightly with a lid so no water gets in.
• Place it in the dishwasher on a hot cycle without any soap and run it for about two and a half hours.

Check and serve

• Carefully remove the hot dish from the dishwasher and uncover it.
• Check that the noodles are cooked through; if the lasagna is still watery, let it rest before serving.