Had a fun time in Bruges in June, every restaurant (and there are loads!!) had huge blackboards out with ASPERGES!!! scribbled on them - felt like Aspie City.
Some swear on the bechamel sauce thing, but if you ask me it's best on its own with a good dollop of molten butter. (Very messy though, make sure you roll up your sleeves and are covered in layers of napkins. One of those 'dirty pyjama day' foods best eaten at home ;)