Steak with Peppers, Onions, and Bean Sauce

A friend in British Columbia learned how to make this dish in a Chinese cooking class. 

6 oz. beef (round steak, flank steak, or fillet)

2 green peppers

1 red pepper

l large onion

1 tbl. black bean sauce

1 clove garlic

Salt to taste

4 tbl. oil

Marinade for beef:

2 tsp. soy sauce

1/2 tsp. salt (optional)

1 1/2 tsp. cornstarch

pinch of sugar

Dressing:

2 tsp. soy sauce

2 tsp. wine

1 1/2 tsp. cornstarch

1/2 cup stock or water

Stir well until smooth

Cut beef into thin slices (1 1/2 inch by 1 inch). Marinate. Slice peppers and onions the same size as the beef. Chop garlic. 

Heat oil in wok, add garlic and brown slightly, then add beef and stir fry until the color changes. Remove from wok. 

Add onions to wok, brown slightly, add peppers and stir fry together until the peppers are glossy. Add bean sauce and salt to taste. Add dressing and stir well. Bring to a boil, then return beef and mix. Serve immediately with rice.