Recipe Basler Mehlsuppa

Ingredients
4 tablespoons all-purpose flour
1 cup sliced onion
1/2 cup red wine
4 cups beef stock
2 tablespoons butter
4 thick slices whole wheat bread
1/2 cup shredded Gruyere cheese
salt and pepper to taste

Directions
In a heave saucepan over medium heat, heat the flour gently until it begins to turn pale golden brown, stirring constantly. Remove from heat.
In another pan, saute onions in butter. When transparent, blend them into the flour. Gradually add the beef stock, the wine and the salt and pepper to taste. Cook gently, stirring frequently, for about 30 minutes.
Put a slice of bread in each person's bowl with a good sprinkling of cheese on top. Pour soup into each bowl and serve at once.