Rich Onion Beef Soup - cooking recipe

Ingredients

2 cups thinly sliced sweet onions
4 tablespoons butter
2 lbs cubed deli roast beef or 2 lbs leftover cubed cooked beef roast
2 (14 1/2 ounce) cans beef broth
4 tablespoons all-purpose flour
1/2 teaspoon ground mustard
1/2 teaspoon sugar
1/2 cup red wine
1 teaspoon browning sauce

Preparation

In large saucepan cook onions in butter over medium-low heat 15 to 20 minutes or until tender and golden brown, stirring occasionally.
Add beef and broth.
Bring to a boil.
Reduce heat, cover and simmer 10 minutes.
In a small bowl, combine flour, mustard and sugar, stir in wine and browning sauce until smooth.
Stir into the soup.
Bring the soup to a boil and cook and stir for 1-2 minutes or until slightly thickened.