Anyone know which one of the African shops on the Chaussée de Mons or near les Abattoirs d'Anderlecht sells lenga lenga? But if I really must, I'll go tot Matonge (not much time though, we come from the Flanders country side)
Express Afro Indian:
http://www.expressafroindian.com/africanfoods.html
The grain amaranth is available in many places beyond African shops.