Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
   1      package       lasagna -- (500g)
   1      pound         lean ground beef
   1                    onion -- finely chopped
   1      clove         garlic -- minced
   1      can           sliced mushrooms -- (10 oz/284ml
   1      can           tomato spaghetti sauce -- (14oz)
   1      can           tomato paste -- (5-1/2oz/156ml)
   1      teaspoon      salt
   1      teaspoon      dried oregano
   1                    egg -- beaten
   1      cup           creamed cottage cheese
     1/3  cup           grated parmesan cheese
   1      package       sliced mozzarella cheese
   1      package       spinach -- thawed,chopped

Preparation:

Cook lasagna in a large quantity of boiling water until just barely tender; drain off most of water; add ice cubes to stop cooking. (Allow lasagna to stand in cold water to prevent pasta sticking together.) In a saucepan, brown meat with onion and garlic; drain off fat. Cook over low heat, covered, for about 5 minutes Stir in mushrooms with liquid, tomato sauce, tomato paste, salt and oregano. Simmer 15 minutes. Combine egg with spinach, cottage and parmesan cheeses. Spread 1/3 of meat sauce in 13x9 in. baking dish. Cover 1/4 of lasagna (about 5 overlapping strips.) Alternate another 1/3 of sauce and 1/4 of lasagna. Spread spinach mixture over pasta and cover with 1/4 lasagna strips. Top with remaining sauce and pasta. Arange mozzarella cheese on top. Bake at 350F for 30 minutes. Let stand 10 minutes. before serving.