1. In 12-inch nonstick skillet, heat 1 tablespoon vegetable oil over medium-high heat until hot. Cook beef in oil 6 to 8 minutes, stirring frequently, until no longer pink. Remove beef from skillet; drain. Wipe out skillet with paper towel. In same skillet, heat 1 teaspoon vegetable oil over medium heat. Add onion and garlic to skillet; cook 3 to 5 minutes, stirring occasionally, until onion is almost tender.
2. Stir in cooking sauce, Worcestershire sauce, 3/4 teaspoon salt and 1/4 teaspoon pepper. Heat to boiling, stirring occasionally. Simmer uncovered 6 to 8 minutes, stirring occasionally, until slightly thickened.
3. Stir in sour cream until well blended; stir in beef. Heat just until hot. Serve over noodles.
*Partially frozen meats are easy to slice; freeze sirloin 30 minutes before slicing.