Boiled Beef with Tomato Sauce

Description
In Romanian: Rasol cu sos de rosii

Ingredients

 * 2 lbs / 1 kg boiled beef
 * 2 – 3 onions
 * 1 tablespoon tomato paste or 1 lb / 500 g boiled and strained tomatoes
 * 1 cup beef broth or milk
 * 1 tablespoon butter
 * 1 tablespoon vinegar
 * a little sugar
 * salt
 * flour

Directions

 * 1) Cut the cold meat in bite sizes, place on a platter and cover with the following sauce: fry the chopped onion in butter until softened.
 * 2) Add the flour, mix well and pour the broth or milk on top.
 * 3) Add the tomato paste or chunks of peeled and seeded tomatoes, salt and pepper.
 * 4) Cover the pot and let it boil at slow heat until the liquid is entirely gone.
 * 5) Serve with polenta.