Facebook probably has a hundred groups of "Poland for Tourists" or "I want to visit Poland" or some such, I used to run a similar group for Brazil, it was full of locals who wanted to meet foreigners and generally a good source for info, it might be worth making a profile specifically for this purpose (and skipping all the rest of the FB drama).
But since you're looking at a really specific kind of trip involving food culture, I would skip that and go straight for Slow Food Poland, there is a site showing different places where Slow Food is active, plenty of ideas for cool people to reach out to (I find that Slow Food, organics, and
permaculture all tend to overlap, in my travels the Slow Food people have generally been all my kind).
You could write people where you're thinking of going, I see there is a blog type thing, the site seems updated regularly, from these pages you might find more info to search for groups focusing specifically on the things you're interested in. Start here maybe?
https://www.slowfood.com/nazioni-condotte/poland/
https://www.slowfood.com/tag/slow-food-poland/