Make the ragù: This step should be done the day before, both because the ragù itself takes several hours to cook and because it tastes much better the next day. Angelina always used her signature ragù della domenica or Sunday sauce. Make sure that the ragù is not too thick—it should be quite loose—loose enough to pour easily—to account for evaporation as the dish bakes. Dilute with water if need be.

Make the pasta: While lasagna di carnevale can be made with factory-made hard durum wheat lasagna, Angelina usually made her own fresh egg pasta (see this post for instructions). Unlike the pasta for lasagne alla bolognese, however, for this rustic dish you need to roll out your pasta rather thicker than usual; use setting '4' on most pasta machines. And I like to add a heaping spoonful of semolina flour for each 100g/1 cup of "OO" flour, to give the pasta a bit more 'bite'. Cut the pasta into large sheets that will fit into your baking pan. (I usually make mine big enough so that two sheets of lasagna will cover the entire pan.)

Make the polpettine: The lasagna is stuffed with, among other things, polpettine, or little tiny meatballs. You should use the same mixture of beef, pork, cheese, bread and seasonings as you would for polpettone, or Italian meatloaf (see this post for the recipe) but make the meatballs just as small as you possibly can, no more than 2-3cm/1 inch round, at most, smaller if you can manage it, remembering that they will be placed between the lasagna layers. Then shallow fry them in light olive oil until just golden brown. The recipe for zitoni al forno con le polpettine, or baked ziti, gives details on how to make these little meatballs.

Fry the sausage (optional): In a classic lasagna di carnevale, the stuffing also includes long, thin sausages called cervellatine. They don't make them outside Campania, as far as I know. If you don't have them, you can either omit them and just use more meatballs, or cut up some 'sweet' Italian sausages and fry them in olive oil. (Or just slice up some of the sausages from the ragù.)

Make the ricotta cream and cut up the mozzarella. Mix all the ricotta cream ingredients well in a mixing bowl with a spatula. Take a large ball of fiordilatte (mozzarella made from cow's milk) and cut it into cubes.

Cook the pasta sheets: Cook the lasagna sheets al dente, remembering that they will cook again in the oven. Since these sheets are thicker than the usual pasta and contain a bit of semolina, however, you will need to cook them for longer than other types of fresh pasta, say around 3-5 minutes, depending on how long they have been left to dry. If using factory-made pasta, follow the directions on the box. Do not crowd the lasagna or they may stick together; you may have to cook them in batches. When done, scoop them out with a slotted spoon and pat dry with a towel, taking care not to burn yourself with the hot water that will cling to the pasta sheets.

Assemble the dish: In a large baking or 'lasagna' dish, which you will have greased with lard or olive oil, spread a bit of the ragù over the bottom. Then cover the bottom with a layer of pasta. Since these pasta sheets are rather thick, avoid overlapping them. (You may have to trim the pasta with a knife or a pair of scissors, but that's fine.) Then cover the pasta with a generous layer of ragù. Top the ragù with the polpettine and, if using, the sausage pieces, and then with dabs of the ricotta cream here and there. (You can add more grated cheese if you like, but in Angelina's version, there is ample grated cheese in the ricotta cream.) Then place another layer of pasta and repeat, until you've used up your ingredients. Top with a generous dusting of grated parmesan cheese and a nice layer of ragù. Drizzle with olive oil.

Bake the lasagna: Bake your lasagna in a moderately hot oven (180C, 350F) for about 45 minutes, until the top is just beginning to brown.

Step 9: Serving the lasagna: When done, remove the lasagna from the oven and allow to settle and cool for at least 30 minutes. In fact, Angelina almost always made her lasagna ahead and reheated it gently, which gave it a rather firm texture and allowed the flavors to meld beautifully.