Stir-Fry Beef - soy sauce

Ingredients

• 2 Tbsp. soy sauce
• 1/4 c. seasoned rice vinegar
• 1 Tbsp. vegetable oil
• 1/4 tsp. garlic powder
• 1/8 tsp. ground ginger
• 1 lb. boneless beef sirloin steak
• 2 Tbsp. vegetable oil
• 1 1/2 c. small fresh broccoli flowerets
• 1 medium onion, cut in strips
• 1/2 medium red bell pepper, cut in strips
• 1/2 medium yellow bell pepper, cut in strips
• 1 (6 oz.) jar whole mushrooms, drained
• 1 c. water
• 1 Tbsp. cornstarch
• 1 tsp. beef flavored bouillon (instant)
• 1 c. rice, cooked