Slice meat into thin bite size strips. Mix the soy sauce, cornstarch, sesame oil and pepper. Toss the beef strips in this mixture.
Heat 2 tablespoons of oil in a wok or large frying pan. Stir fry the vegetables and cover to steam for a couple minutes. The vegetables should be tender-crisp. Remove from the pan and set aside.
Wipe out the pan and add 2 tablespoons of oil. Add the garlic and cook over high heat for about 30 seconds. Then add the beef strips and brown them.
Mix the beef bouillon, soy sauce, sugar and cornstarch together. Add to the wok and cook and stir until thickened. Add the cooked vegetables and the tomato wedges, and cook until heated through. Makes 4 servings.