Stir-Fry Steak - cooking recipe

Ingredients

1 1/4 lb. sirloin or round steak, sliced in 1/8-inch or less slices across grain
3 Tbsp. dark soy sauce
1 1/2 Tbsp. wine vinegar
2 Tbsp. cornstarch
1 tsp. sugar
1/4 tsp. pepper
1 bell pepper, cut in 1/4-inch strips
2 medium onions, cut in 1/4-inch strips
3 stalks celery, cut in 1/4-inch strips
4 Tbsp. olive oil

Preparation

Marinate the meat 1/2 hour or longer in mixture of soy sauce, vinegar, cornstarch, sugar and pepper.
Get frypan hot, almost smoking, then add 2 tablespoons of olive oil and vegetables; stir-fry until just transparent (about 2 minutes).
Take up.
Wipe or clean skillet and reheat.
Add about 2 tablespoons of oil, then add meat and stir-fry until almost done.
Add vegetables and remainder of marinade.
Stir until well heated.
Serve immediately over fluffy rice.