Yellow Onion Soup - cooking recipe

Ingredients

6 oz. onions, thinly sliced
2 Tbsp. butter
2 level Tbsp. flour
5 c. beef stock
salt to taste
pepper to taste
Mozzarella or Swiss cheese

Preparation

Saute the onions in the butter for a moment.
Sprinkle them with the flour and as soon as they start to brown, stir in the stock.
Add salt and pepper to taste and cook for about 20 minutes.