How do you build a pie business from scratch? Cherry Bombe's Kerry Diamond asks that and more of Emily Elsen, co-founder of Four & Twenty Blackbirds, the celebrated pie shop in Gowanus, Brooklyn. Elsen talks about working with her sister Melissa, their cookbook, the Four & Twenty shop at the Brooklyn Public Library, and the art of making sour cherry pie. Tune in to hear more from this funny and fearless pie-o-neer. This program was brought to you by the International Culinary Center.