Dad'S Favorite French Onion Soup

• 4 tablespoons butter
• 1 lb onion, peeled and finely sliced
• salt and pepper
• 1/2 teaspoon ground mustard
• 2 teaspoons flour
• 4 cups beef stock
• 1 cup white wine
• French bread, sliced and lightly toasted
• swiss cheese, sliced or shredded
• parmesan cheese, fresh grated

1. In a big saucepan, melt the butter; add the onions, salt and pepper, and mustard.
2. Saute over low heat, stirring occasionally, until onions are browned (20-30 minutes).
3. Add the flour and stir until smooth.
4. Add the stock and wine; stir constantly until mixture comes to a boil.
5. Lower the heat and simmer, covered, for 30 minutes.
6. Note: can be made in the crock-pot and cooked on LOW all day after the ingredients are browned.
7. To serve: place French bread slices in oven-proof bowls, add cheeses over the bread.
8. Pour soup over the bread and place bowls under the broiler until the cheese melts.
9. Note: I put the bowls on a baking sheet then place them in the oven under the broiler.

butter, onion, salt, ground mustard, flour, beef stock, white wine, bread, swiss cheese, parmesan cheese

Taken from www.food.com/recipe/dads-favorite-french-onion-soup-63850 (may not work)