Curried Beef without stalks yogurt

1 tablespoon canola oil 1/2 lb cooked beef steak , sliced 1/4 onion , thinly sliced 1/4-1/3 yellow pepper, thinly sliced 1/4 cup water 1 tablespoon soy sauce[...]

1/2 tablespoon canola oil 1/2 lb cooked flank steaks or 1/2 lb cooked skirt steak, cut into strips 1/4 onion , thinly sliced 1/4 yellow pepper, thinly sliced[...]