Heat oil in medium skillet on medium heat. Add onion; cook and stir 5 minutes or until just caramelized. Add raisins, sugar, cinnamon, ancho chile pepper and salt; cook and stir 1 minute. Add bourbon whiskey; stir to loosen browned bits in bottom of skillet.
Mix peaches, lemon juice and vanilla in medium bowl. Add onion mixture; mix well. Cover.
Refrigerate at least 1 hour to blend flavors.