Robert Sietsema has taken on New York City's best pizza slices. He issued a sometimes eyebrow-raising list of the best bagels in town. Now, our friend from Eater NY is putting himself at the center of a battle over the best roast beef sandwich in Brooklyn. Food writer Robert Sietsema joins Weekend Edition host David Furst to discuss Roll-N-Roaster in Sheepshead Bay and Brennan and Carr in Marine Park.