Zeeweg 42, Torhout, 8820, be
It's a small shop, and in fact it doesn't really look like a shop. But they have a top-class product: the best mustard in the world that is produced by this family since 1869. (Open every day from 8:30 to 12:00 and from 13:30 to 18:00, except on Thursday afternoon, Saturday afternoon, Sundays and holidays).
What to buy: You can buy the mustard in glass pots or in beautiful stone pots, or you can just bring your own pot and they just fill it up with mustard.
Next to mustard they also sell their own mustard beer, cookies and jenever, but I have never tried these.
What to pay: Ridiculously cheap!