Cut the onions fine. Put the oil in a spider, and when it is smoking hot put the onions into it, and also the peppers cut fine.
The beef should have been already cut into dice. When the onions turn yellow add the meat gradually, so as to avoid cooking the oil too much. Stir occasionally, to sear the beef.
In about 5 to 10 minutes add a cup of hot water, and cover. Let it stew for about 2 hours.
Heat the beans in a separate kettle. Mix the flour with some water for thickening, and before adding it, pour 1 large tablespoon of Worcestershire over the meat.
Keep plenty of water on the meat to prevent its scorching. Cook all for 10 minutes, and then drain the beans, and add to the beef.