Let's begin with tomato sauce: it will take about 3 hours so it's good to take a whole afternoon of time and have patience! Chop finely onion and sautée in extra virgin olive oil. Add meat and brown it on each side, then pour in the tomato sauce and cook over low heat for about two hours. Check frequently the tomato sauce: let it cook slowly, adding a bit of water to help cook - if needed.
Now is the time to make meatballs. Combine in a bowl mincemeat, garlic and chopped parsley, bread crumbs, cheese, salt, pepper and eggs. Mix well with a fork and shape small balls with your hands, slightly larger than a pea, flour them and fry in hot olive oil: remove them from the pan when they are golden and let them to dry on a sheet of towel paper.
At this point, about two hours have passed since the tomato sauce is cooking: remove the meat and add meatballs: let them simmer in the sauce for another hour. If you want, you can slice the meat andeat with pickles, says Aunt Teresa!
Now it's time to make lasagna: pour a few tablespoons of tomato sauce and meatballs on the bottom of a baking dish, make one layer of pasta sheet, then sliced boiled eggs and more sauce and meatballs again. This time add the slices of spicy sausage, sauce and meatballs, lasagne sheet and sliced smoked scamorza. Keep on making layers with your ingredients. Usually they make 4 or 5 layers, at least! It should be pretty high and rich!
Cover with grated cheese, tomato sauce and meat balls and a few knobs of butter. Cook in hot oven at 200 °C for about 40 minutes, until top is golden, brown and crispy.