In a medium bowl, combine soy sauce, sugar, garlic powder, and ground ginger.

Add steak strips to the mixture and marinate for 10 minutes.

Drain the marinated steak.

Heat oil in a large skillet over high heat.

Stir-fry the steak in the hot oil until browned.

Add chopped red pepper, green pepper, and onion to the skillet.

Stir-fry the vegetables until tender.

In a separate bowl, whisk together beef broth and cornstarch.

Pour the broth mixture into the skillet and bring to a boil for 1 minute, stirring constantly.

Prepare instant rice according to package directions.

Add the cooked rice to the skillet.

Mix well to combine all ingredients.

Serve immediately.