In A Large Heavy Skillet, Combine The Oil, Vinegar And Pepper. Cook And Stir Over Medium Heat Until Blended. Add Walnuts And Cook Over Medium Heat Until Nuts Are Toasted, About 4 Minutes. Sprinkle With Brown Sugar. Cook And Stir For 2-4 Minutes Or Until Sugar Is Melted. Spread On Foil To Cool. Store In An Airtight Container.