Combine TABASCO® Chipotle Sauce and cubed beef in a medium bowl and marinate in refrigerator at least 1 hour.
Meanwhile, heat 1 tablespoon of the oil in a small skillet over medium heat. Add onion and garlic and cook 1 to 2 minutes or until tender; stir in tomatoes and set aside.
Heat remaining 1 tablespoon oil in a large skillet over medium heat; add marinated beef and cook 10 to 12 minutes or until completely cooked. Add green pepper and cook 2 minutes longer. Stir in tomato mixture and heat through. Serve over corn tortillas or rice, if desired.
Makes 4 to 6 servings.