Anybody toying with Koji?

A while ago I managed to find a webshop selling koji spores and figured 'hell, why not?'.

I've seeded some rice successfully and made 2 batches of miso - one with chickpeas and another with plain old beans. Loved the results.

Then I was inspired by the veggie charcuterie I've seen Sandor Katz's book (I think it was there?) and thought I could maybe use it to make fake dry-sausages out of slabs of cooked seitan seeded with the koji spores. Success was limited since I did not get a full cover on the bits before the thing started sporulating, so I placed it in a dehydrator. Nevertheless, it was a fairly tasty addition to stir-fries, albeit a bit tough.

Anybody ever done funky things with koji? Looking for some weird new ideas to try out.