In a skillet sauté 1 pound pork shoulder in 1 tablespoon olive oil until the meat is brown on all sides.
Add 1 small onion and 1 clove of garlic, both chopped.
Cook until the onion is golden.
Add 1 tablespoon minced parsley, a little salt and pepper and 1 1/2 cans Italian-style tomato paste mixed with 2 cups hot water.
Cover the skillet and simmer for 2 hours, adding a little water from time to time, if needed.
Remove the pork from the sauce and reserve it as a separate course or reserve it for another meal.
Cook 1 pound wide lasagna noodles in 5 quarts rapidly boiling salted water for about 15 minutes or until tender, stirring frequently to prevent the noodles from sticking together, and drain.
Mix 1 pound ricotta cheese with about 1 tablespoon warm water to make a soft paste.
Arrange the noodles in layers in a baking dish.
Cover each layer if noodles with some of the sauce.
Cover the sauce with a layer of the ricotta paste.
Sprinkle the ricotta with grated Parmesan cheese.
Bake the lasagna in a moderate oven (350°D) for about 20 minutes.