Cook the asparagus tips in salted water for 2-3 minutes until just tender. Drain, then cool quickly in ice-cold water. Drain again and keep on a damp cloth. Cut white asparagus in half lengthways.
Open the scallops, using the tip of a small, sharp knife to ease the scallop apart. Scoop from the shell with a soup spoon. Remove and discard the brown frill surroundi