Quinoa ( /?ki?nw??/ or /k??no?.?/, Spanish: quinua, from Quechua: kinwa), a species of goosefoot (Chenopodium), is a grain-like crop grown primarily for its edible seeds. It is a pseudocereal rather than a true cereal, or grain, as it is not a member of the grass family. As a chenopod, quinoa is closely related to species such as beets, spinach, and tumbleweeds.
Quinoa is grain-LIKE , not a grain so there is no problem. If you don’t want to eat, fine but it is not chametz