Moules Frites

• 2 quarts (2¼ litres) mussels
• 1 egg
• toasted breadcrumbs<

Discard any mussels with broken shells and any that remain open. Scrub the mussels and, using a knife, pull away the beards. Clean them thoroughly in several changes of cold water.

Butter the inside of a large saucepan, add 2–3 tablespoons of water and all the mussels. Cover with a lid and p