Take a medium-sized saucepan and add the Italian sausage into this pan. You need to get a browned sausage for the lasagna so cook it and then dispose of the waste.
You need a mixing bowl for the next step. Take this bowl and make sure it has the exact size as needed. Clean it with a clean cloth.
To make the mixture, bring the shredded ricotta cheese and add to it. Make addition some sugar into it.
Beat and egg separately and add in along with the pepper, salt, and nutmeg. Sprinkle in the parsley at the end. Mix.
Then to prepare the paste, boil it in hot boiling water after adding some salt and oil to it.
Then take a baking dish and spread the sauce on the bottom. Over it, you need to add the pasta strip which is then followed by the mixture you have just prepared.
Spread some of the mozzarella cheese and add the browned sausage in the end.
In the end, add some more strips. Make more layers and dress the top layer with some shredded cheese.
Once your lasagna is all layered up in the baking pan, and your oven is also preheated, you must bake it for half an hour.
Then take out, let cool to handle, and Serve!