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Mustard Sauce for Boiled Beef

4 servings

Ingredients

• 1 pcs finely chopped onion or shallot
• 1 tbsp butter
• 1 tsp sugar
• 1 tbsp flour
• bouillon or boiling water (as needed)
• 1.5 tbsp mustard
• lemon juice (a little)

Instructions

1. Roast one finely chopped onion or shallot with one tablespoon of butter and one teaspoon of sugar until light yellow.
2. Brown one tablespoon of flour in it and add enough bouillon or boiling water to make the sauce creamy.
3. Finally, add one to two tablespoons of mustard and a little lemon juice.

Modernized from a treasured 19th-century German cookbook.