In a 12 to 14 inch saute pan, heat oil until smoking. Dredge the chicken livers into the seasoned flour and shake excess flour off. Saute chicken livers until crisp and golden brown, about 8 to 10 minutes, and remove to plate. Add leeks and apricots to pan and cook until leeks are softened, about 8 to 10 minutes. Add chicken livers back to pan, add vinegar and butter and cook until liquid is reduced by half. Add endive to pan. Toss to coat and serve immediately.
Recipe Courtesy of Mario Batali