Flatten each tenderloin slice to 1/4-in. thickness. Sprinkle with salt and pepper. In a large nonstick skillet over medium heat, cook pork in oil until tender. Remove and keep warm., Add peaches and lemon juice, stirring to loosen browned bits from pan. Cook and stir until peaches are tender, 3-4 minutes. Stir in the pork and preserves; heat through.