Step 1

Stir the cornstarch, broth, soy sauce and garlic powder in a small bowl until the mixture is smooth.

Step 2

Stir-fry the beef in a 10-inch nonstick skillet over medium-high heat until it's well browned, stirring often. Pour off any fat.

Step 3

Reduce the heat to medium. Add the pepper and onion. Stir in the cornstarch mixture. Cook and stir until the mixture boils and thickens. Serve the beef mixture over the rice.