I find Belgium great for food and drink. I visit Ypres a lot, doing WW1 battlefield research and find that although I've been there weeks at a time two or three times a year for the past three years, I still find something new to see or do.
While Ypres is a small-ish town, there are several smaller supermarkets, including a Spar where fresh milk is available.
Seafood is available also, but Ypres is 1 1/2hrs drive from Oostende where fresh seafood is sold each day along the front. Brugge is a nice day's trip also.
Belgian beer, well... best I have ever come across. Rob Jax has already identified two great beers from the expanding Leffe range... Leffe blonde great (6.2%) as is Leffe Bruine. They also do a Leffe Tripel at 8.8%, and this year introduced a new one Leffe 9% with a blue top (not to be mixed with the blue top milk). In Ypres, you can get the local fermentation... called Ypra.. silk from the tap. Hoegarden is a nice beer but the exclusive Trappistes Rochefort.... drool... 10%alc.. a beer !!!