- 1/4 cup reduced-sodium soy sauce
 - 1 pound boneless beef sirloin steak, cut into 1/8-inch-thick strips
 - 2 teaspoons cornstarch
 - 1/2 teaspoon beef bouillon granules
 - 1/2 teaspoon Chinese five-spice powder
 - 1/2 cup water
 - 2 tablespoons canola oil, divided
 - 1 cup sliced fresh carrots
 - 1 medium green pepper, julienned
 - 1 cup sliced celery
 - 1 cup sliced fresh mushrooms
 - 1 (8 ounce) can sliced water chestnuts, drained
 - 1/2 cup sliced green onions
 - 6 cups torn fresh spinach
 - Hot cooked rice
 
- Place soy sauce in a large resealable plastic bag; add steak. Seal bag and turn to coat; refrigerate for up to 2 hours. Drain and discard soy sauce.
 - In a bowl, combine the cornstarch, bouillon, five-spice powder and water until smooth; set aside. In a large nonstick skillet or wok, sir-fry beef in batches in 1 tablespoon hot oil until beef is no longer pink. Remove from skillet and set aside.
 - Stir-fry carrots in remaining oil for 2 minutes. Add the green pepper, celery and mushrooms; stir-fry for 3 minutes. Add the water chestnuts and onions; stir-fry for 2 minutes or until vegetables are crisp-tender. Stir cornstarch mixture and add to the pan. Bring to a boil; cook and stir for 2 minutes. Add spinach and beef; cook and stir until spinach is wilted and beef is heated through. Serve over rice if desired.