Spicy Japanese Crack (in red and green)

There is a spicy Japanese condiment called yuzukoshō (柚子こしょう) which consists of yuzu peel and chilli peppers which are then fermented.

It is very spicy (a little bit goes a long way), and has a strong citrusy scent from the yuzu peel. It takes on the color of the chilli peppers used — red chilli peppers yield an orange paste, and green chilli peppers yield a dull green paste.

Traditionally, it's used for nabemono dishes but its popularity means it's showing up everywhere.

This stuff is addictive. Once you use it you can't go back.