Rivvel Soup
["1 egg", "1/4 tsp. salt", "1 c. flour", "1 1/2 qt. rich beef broth"]
["Put flour in a bowl; make a well in center and add the egg and salt.", "Work into flour with fingers to make small crumbles. Sprinkle into boiling meat broth, stirring as you add Rivvels.", "A tablespoon of beef soup base will enhance the flavor.", "Simmer 20 minutes."]
["egg", "salt", "flour", "rich beef broth"]