Onion Sauce

Ingredients

 * 1 tablespoon butter
 * 1 tablespoon flour
 * 2 onions
 * 1 teaspoon sugar
 * 1 tablespoon tomato sauce
 * 1-2 tablespoons vinegar or lemon juice
 * 2 cups beef broth or water
 * salt

Directions

 * 1) Chop the onions and fry in butter until yellowish.
 * 2) Add the flour, fry a little and then add the broth, stirring continuously.
 * 3) Add salt, sugar and tomato sauce and let boil for 10 minutes.
 * 4) Then add the lemon juice and simmer until thickened. To be served with beef or pork.