1. Remove bones from duck; shred the flesh and cut skin into thin strips. Line a microwave-safe plate with paper towels. Cut wraps into quarters; keep stack covered with plastic food wrap.
2. Place a wedge of wrap on a board with its point facing you; very lightly brush with sesame oil. Place a piece of onion, cucumber, some duck flesh and skin touching the point of the wedge. Add 1⁄2 teaspoon hoisin sauce; sprinkle with seeds. Roll up firmly from side to side and tie with a chive. Place on prepared plate. Cover with plastic food wrap.
3. Microwave on High (100%) for 10-15 seconds to warm through. Serve at once with extra hoisin diluted with a little water.