The beans are served over white rice. Brown rice is often offered as an alternative to white rice. It is typically served over white rice. The dish is served over white rice. Historically, beriberi was associated with a diet based on polished rice (white rice). Unpolished brown rice requires longer soaking time than milled white rice does. It is traditionally served with white rice. It is commonly served with a side of shoe-string potatoes and white rice. Most parboiled rice is milled in the same way as white rice. Thiamine, missing from white rice, is present in soba. Eating a lot of white rice appears to play a role in increasing risk. His meals consisted of white rice on white plates. Soba can nutritionally complement other grains like white rice and wheat flour. It is considered a heavy meal, traditionally eaten with white rice. Koji is produced by introducing the mould "Aspergillus oryzae" onto steamed white rice.