Ham Stuffed Shells

Provided by Carol Myers

4 ounces of Jumbo shells
1/4 cup of onion
3 cups of ground, cooked ham loaf
4 ounces of mushroom pieces
3 tbs parmesan cheese
3 tbs margarine
3 tbs flour
2 cups milk
1 cup shredded Velveeta cheese

Cook shells for 15 to 20 minutes, drain, and rinse with cold water.  Brown the ham loaf and onion in a pan.  Cool meat and add parmesan cheese.  Melt margarine, and add flour and milk.  Cook until thick and add Velveeta cheese.  Mix 1 cup of cheese sauce mix with the ham loaf and onion.  Fill the shells, put in a baking dish, and cover with the remaining cheese sauce mix.  Bake at 350 degrees for 30 minutes.  The last 10 minutes of the bake, sprinkle 1 cup of buttered and crumbled ritz crackers.