Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
  1              pound  boneless beef sirloin steak
     1/4           cup  soy sauce
     1/4           cup  water
  1         tablespoon  cornstarch
  2        tablespoons  cooking oil -- divided, (up to 3)
  2              small  onions -- thinly sliced and
                        -- separated into
                        -- rings
  1                     green pepper -- cut into 1-inch
                        -- pieces
  2                     celery ribs -- sliced diagonally
  2                     tomatoes -- cut into wedges
                        cooked rice

Preparation:

Partially freeze beef. Thinly slice across the grain into bite-size strips; set aside. For sauce, combine soy sauce, water and cornstarch; set aside. Heat 1 tablespoon oil in a large skillet or wok over high heat. Stir-fry half of the beef until browned. Remove and repeat with remaining beef, adding additional oil as needed. Remove meat and keep warm. Add onions, green pepper~ and celery to pan; stir-fry until crisp-tender, about 3 to 4 minutes. Return beef to pan. Stir the sauce; add to pan. Cook and stir until thickened and bubbly. Cook and stir 2 minutes more. Add tomatoes; cook just until heated through. Serve over rice.

Nutritional Information:

122 Calories (kcal); 7g Total Fat; (50% calories from fat); 3g Protein; 14g Carbohydrate; 0mg Cholesterol; 1055mg Sodium