Sauce Robert

Ingredients

• 4 large onions
• 3 oz. butter
• 1 dessertspoonful flour
• 1/2 pint beef or veal gravy
• 1 dessertspoonful made mustard
• salt and pepper

Instructions

1. Cut four or five large onions into small dice.
2. Brown them in a stewpan with three ounces of butter and a dessertspoonful of flour until they reach a deep yellow-brown colour, about 10 to 15 minutes.
3. Pour half a pint of beef or veal gravy to the onions and let them simmer for 15 minutes.
4. Skim the sauce and add a seasoning of salt and pepper.
5. At the moment of serving, mix a dessertspoonful of made mustard into the sauce.