1/2 lb. top round or sirloin steak
1/4 c. pure vegetable oil
1 sm. onion, sliced
1 1/2 c. diagonally sliced celery
3/4 c. thinly sliced carrots
1 tbsp. cornstarch
1/4 c. soy sauce
1 (8 oz.) can tomato sauce
1 tsp. sugar
1/4 tsp. ground ginger
1 sm. green pepper, cut in thin strips
1 (4 oz.) can sliced mushrooms, drained
3 c. hot cooked rice