Sauerbraten Meatballs
["1 lb. ground beef", "1 egg, beaten", "1/2 tsp. salt", "1/8 tsp. pepper", "1 1/2 Tbsp. margarine, melted", "1/2 c. wine vinegar", "8 gingersnaps, crushed"]
["Combine first 5 ingredients.", "Mix well.", "Shape into 1 1/2-inch balls.", "Brown in margarine in a large skillet over medium heat. Drain well.", "Combine remaining ingredients except sour cream.", "Mix well.", "Pour over meat balls.", "Cover and cook over low heat for 30 minutes.", "Remove meatballs to a service plate and keep warm. Strain sauce; stir in soup.", "Pour over meatballs.", "Serves 4."]
["ground beef", "egg", "salt", "pepper", "margarine", "wine vinegar"]