1 sm. pkg. spaghetti
1/4 c. butter
1/2 c. chopped onion
1 c. canned tomato soup
1 c. grated cheese
1 egg, beaten
1 tsp. Worcestershire sauce
Salt
Pepper

Cook spaghetti in boiling water until tender. Drain and rinse in hot water. Melt butter in saucepan; cook onion until tender. Add tomato soup and when hot, put in grated cheese. When cheese has melted, pour part of mixture over the beaten egg and then combine egg with sauce.

Season with Worcestershire sauce, salt and pepper. Stir constantly until slightly thickened; do not boil. Put spaghetti on hot platter. Pour sauce over it.