In a deep medium skillet, heat the remaining 1/4 cup of oil. Season the chicken with salt and pepper and dust with the flour, shaking off the excess. Cook the chicken over high heat, turning once, until golden, about 6 minutes. Add the olives, capers and stock and bring to a boil. Cook over high heat until the stock is reduced by about two-thirds, about 5 minutes. Add the roasted lemons, butter and parsley, season with salt and pepper and simmer just until the chicken is cooked through, about 1 minute.