In 10- or 12-inch skillet, heat oil over medium-high heat. Add beef strips; cook and stir until browned. Drain. Stir in water and Sauce Mix. Increase heat to high; heat to boiling, stirring occasionally. Stir in Pasta. Reduce heat to medium-low; cover and simmer about 10 minutes, stirring occasionally, until pasta is tender (sauce will thicken as it stands).