Select beans that have a bright green colour and will snap easily if bent. Avoid any that look wrinkly or discoloured.

Top and tail, cut into short lengths or leave whole, as preferred.

Blanch in boiling water for 2 minutes. Drain, plunge immediately into a bowl of iced water to cool. Drain thoroughly. Pack in convenient quantities in polythene bags, remove the air, seal, label and freeze. Storage time: 12 months.