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Zwieback Soup

4 servings

Ingredients

• 1 upper cup zwieback, finely crushed
• 1.5 l water
• 1.5 pcs lemon slices
• sugar and salt (to taste)
• 2 pcs egg yolk
• cinnamon (optional) (1 piece)

Instructions

1. Boil the crushed zwieback with the water and lemon slices until the zwieback no longer settles.
2. Season with sugar and salt, then stir in the egg yolk.
3. Optionally, boil a piece of cinnamon with it.

Modernized from a treasured 19th-century German cookbook.