Tortilla Lasagna

This is a favorite of mine. We eat this regularly in our home. It is easy and very yummy, and feeds an army!

1 Lb. ground beef
½ onion chopped
1 jar spaghetti sauce 24-26 oz.
16 oz. Cottage cheese
1 egg
½ pound grated Mozzarella cheese
½ pound grated cheddar cheese
½ cup parmesan cheese
1 package flour tortilla shells

Brown hamburger and onion in a pan and drain well.
Combine with the spaghetti sauce. In large bowl combine beaten egg, and all the cheeses. Save a little of the Mozzarella and cheddar for the topping.
Put a layer of the tortilla shells in a 9x13 pan. Tear them to fill in all the spaces. Then add a layer of sauce and a layer of cheese. Repeat several times ending with the sauce and a topping of the grated cheese. Bake 30 minutes at 350 degrees. Serve hot. On your individual plates top with lettuce, tomatoes, sour cream, green onions and chopped olives as desired.