Oriental Pepper Steak - cooking recipe

Ingredients

1 1/2 lb. (1 inch thick) sirloin steak (I use sirloin tip roast and have them slice it really thin)
1/4 c. vegetable oil
1 clove garlic, crushed or 1/4 tsp. garlic powder
1 tsp. salt
1 tsp. grated fresh ginger root
1/2 tsp. freshly ground black pepper
2 1/2 c. chopped green peppers
2 c. chopped white sweet onions
1/2 c. soy sauce or more to taste
1 tsp. sugar
1 c. beef bouillon or broth (from meat when you stir-fry it)
1 (6 oz.) can water chestnuts
2 c. mushrooms, sliced
2 Tbsp. cornstarch, dissolved in beef broth
6 green onions with tops, cut into 1-inch pieces

Preparation

Marinate the thin slices of sirloin in 3 tablespoons soy sauce, 1 tablespoon oil and pepper for 3 hours.