Pierogie Casserole

15 lasagna noodles
2 cups cottage cheese
1 egg
¼ tsp onion salt
1 cup shredded cheddar
2 cups mashed potatoes
¼ tsp salt
¼ tsp onion salt
1/8 tsp pepper
½ cup butter
1 cup chopped onions
Sour cram (if desired)

Cook noodles and drain.  Live bottom of 9x13 pan with 5 noodles.  
Mix cottage cheese, egg, and onion salt.  Spread over noodles.  Cover with a layer of 
noodles.  In same bowl, mix next 5 ingredients and spread over noodles.  Cover with 
another layer of noodles.  Melt butter in pan and sauté onions until transparent.  
Pour over noodles and cover.  Bake 30 minutes @ 350.  Let stand 10 minutes before 
cutting.  Serve with sour cream if desired.