I've noticed that French supermarkets always have shelf or two filled with asparagus in a jar, some with white asparagus, some with green. It's a product that is rarely seen in UK shops these days so I picked up a couple of jars out of interest while on holiday. What do French cooks do with the stuff? I've looked on a few forums on what to do with jarred or canned asparagus and the advice is usually along the lines of "put it in the bin".