Sauerkraut Soup

Ingredients

• 1 tablespoon fat
• 2 pounds flanken
• 1-1/2 cup onions, minced
• beef bones
• 1 pound sauerkraut
• 2 qt. water
• 2 teaspoons salt
• 1/2 teaspoon pepper
• 1-1/2 cup potatoes, peeled & cubed