Tororo (Japanese: とろろ) is a sticky food made from grating a yam. Tororo is mixed with other food that typically includes dashi, wasabi, and green onions, and the amount of these ingredients can be adjusted to suit one's taste. In Japan, tororo is eaten as a side dish, or added to noodles (udon or soba). Tororo has a lot of vitamin B1, vitamin C, calcium, potassium, and other vitamins and minerals.
Tororo udon/soba change
Tororo Nattō change
The Japanese food nattō is often eaten with tororo, too.
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Media related to Tororo at Wikimedia Commons