I've looked and searched on the net, but the only thing I find are lots of recipes with mandelpotet, or almond potato, and lists of growers etc. Sorry. Looks like it's a Norwegian thing that nobody's bothering much about bar growing and eating it.
Yay Sjoerd. We had a good downpour last night and today is cooler so fingers crossed, all the seeds I sowed yesterday will be thinking about germinating soon.