After a little thought and a little research, I decided on soup. (Of course. 'Cause I love soup, you know?)
Other than picking up a leek from the co-op, I had pretty much everything on hand that I wanted to include in my soup:

In addition to the leek, garlic, celery root, and potato, I also used olive oil, vegetable broth, salt and pepper, and a healthy splash of unsweetened almond milk at the end, for extra creaminess.
Even though the soup looks humble, it was fantastic!

I drizzled a little harissa-infused olive oil over my bowl before slurping, and that just took it over the top. :)
While I can't say that the flavor of the celery root was all that strong, (truthfully, the finished product just tastes like a good, creamy, potato-leek soup,) it was fun to try out a new to me vegetable. Thanks for the inspiration, Dora!