Sushi

Don't know if they are available on the takeaway site but the best sushi in Brussels by all accounts including Japanese people in Brussels is Samouraï on the rue Fosse aux Loups/Wolvengracht 28B (they also have a ramen place at almost the same location called Samouraï Ramen) which has been there for 35 years. Not inexpensive. They are in the courtyard off the street which used to be the grand entrance to a movie theatre; the ramen place is more obvious because it's on the corner of the courtyard and the street .
https://www.samourai-bruxelles.be/en/