We have a lot of Japanese food and condiments here, so I’ve got some suggestions for you:
The yuzu kosho is citrus and a bit hot ... excellent on anything. The onion is so good on arugula, and the sesame is just right. You can order this (and their excellent mayonnaise) on the Kewpie website - 15 bucks gets you free shipping.
And these are excellent - fry/steam on one side, and serve with Japanese hot sauce mixed with ponzu. My favorite is pork and leek, but they’re all good. In the freezer case of your Japanese grocer or perhaps your regular place.