I just returned from Amsterdam on business. While there I stopped at Vleminckx ( http://search.aol.com/aol/image?s_it=... frites&icid=snap-pic&flv=1 ) which is considered by most to have the best "frites" in Amsterdam. These are not Belgian frites but rather unique Flemish frites. The double fried fresh potatoes (in vegetable oil) are served in a paper cone and topped with a huge "gob" of mayonnaise and either sate (peanut) sauce or curry sauce. On top of this are several spoonfuls of minced onion. The little stand which dates to 1887 has incredible fries which, with either of the toppings, have a truly unique taste. The frites themselves, even topped with ketchup or malt vinegar, are outstanding.
Is there any place in the D. C. area that does anything like this? No, not Central nor Beck's nor Thresher's in Ocean City or Boardwalk Fries but authentic Flemish frites? I don't expect them to be as good as Vleminckx but if there is someplace that even comes close for this unique "taste" it would be worth seeking out.