Med Tomato, coarsely chopped halved and thinly sliced (1/2 lb total) Partially freeze meat. Thinly slice across the grain into bite sized strips. set aside. Cook sliced potatoes in boiling water about 5 minutes or till tender. Drain and set aside. Meanwhile, for sauce, stir together beef broth, cornstarch, and salt. Set aside. Spray a wok or large skillet with Pam. Heat over med-high heat. Add onion and stir fry about 2 minutes. Add green or red pepper and stir fry about 2 minutes more or till vegetables are crisp-tender. Remove from wok. Add oil to hot wok. Add beef and curry powder. Stir fry 2-3 minutes or till beef is done. Push beef from center of the wok. Stir sauce and add to center of wok. Cook and stir till thickened and bubbly. Stir in onion mixture, potatoes, and tomato. Cook and stir all ingredients for 1 minute or till heated through. * Per serving: 251 calories, 23 g protein, 21 g carbohydrates, 8 g fat, 53 mg cholesterol, 414 mg sodium, 714 mg potassium.