1Saute ground beef in hot oil until meat loses its pink color. Add tomatoes, tomato sauce, seasonings, and mushrooms. Mix well; cook slowly about 2 hours or until sauce is thickened.
2Cook noodles following directions on package; drain, rinse in cold water and separate.
3In a buttered 3 quart baking dish, make two layers of the noodles, meat sauce, ricotta, slices of the mozzarella cheese and parmesan cheese, in this order, using about half of each for each layer.
4Bake in 350 degree oven for 30 minutes or until bubbly.
5Note: Pepperoni or Italian sausage may be added to meat sauce if desired. You may double the recipe for sauce; use half in making the lasagne, as above, and serve the remainder, cooked down quite thick, in a sauceboat along with the lasagne.