1. Drain bird's nest. Remove peel from winter melon. Then remove
pith and cut into pieces.
2. Bring stock to the boil. Add ginger slice and winter melon.
Cook for 10 minutes. Then cover for 10 more minutes. Discard
ginger slice. Add winter melon into the blender. Process into
winter melon puree.
3. Add bird's nest into winter melon puree and bring to the
boil. Stir in crab meat, seasoning and egg white. Serve.