The Best Easy Beef and Broccoli Stir-Fry

I clipped this recipe from Taste of Home magazine several years ago and have found it to be the best-tasting easy beef and broccoli stir-fry.
Ingredients:

• 3 tablespoons cornstarch, divided
• 1/2 cup water, plus
• 2 tablespoons water, divided
• 1/2 teaspoon garlic powder
• 1 lb boneless round steak or 1 lb charcoal chuck steak, cut into thin 3-inch strips
• 2 tablespoons vegetable oil, divided
• 4 cups broccoli florets
• 1 small onion, cut into wedges
• 1/3 cup reduced sodium soy sauce
• 2 tablespoons brown sugar
• 1 teaspoon ground ginger
• hot cooked rice

Directions:

1. In a bowl, combine 2 tablespoons cornstarch, 2 tablespoons water and garlic powder until smooth.
2. Add beef and toss.
3. In a large skillet or wok over medium high heat, stir-fry beef in 1 tablespoon oil until beef reaches desired doneness; remove and keep warm.
4. Stir-fry broccoli and onion in remaining oil for 4-5 minutes.
5. Return beef to pan.
6. Combine soy sauce, brown sugar, ginger and remaining cornstarch and water until smooth; add to the pan.
7. Cook and stir for 2 minutes.
8. Serve over rice.