Stir-Fried Beef And Peppers

250 g rump steak cut into 1 cm cubes
2 tablespoons soy sauce
1 tablespoon sherry
½ teaspoon sugar
3 tablespoons oil
2 sweet green peppers, seeded and cut into 2.5 cm squares
½ teaspoon salt

Combine 1 tablespoon of soy suce with the sherry and sugar. Add to the beef and toss. Let stand for 15 minutes, turning occassionally. Heat 1 ½ tablespoons of the oil in a frying pan or wok. Add the peppers and stir fry until slightly softened. Remove them from the pan. Heat the remaining oil. Add the beef and stir fry until the meat begins to brown. Return the peppers to the pan. Sprinkle with salt and the remaining soy sauce. Stir fry until done and serve.