Once you know the technique, cooking a large Muscovy duck breast is no more difficult than cooking a steak Fragrant five-spice powder — a heady mix of Sichuan pepper, fennel, clove, star anise and cinnamon — is the perfect duck seasoning, and juicy blackberries make this a brilliant summertime dish Muscovy duck is found at better butchers, from online sources or even at some farmers' markets