Last fall I got a whole bunch of staghorn sumac fruits from the roadside on my trip to Massachusetts, then I brought them back home to NJ. What I did was I soaked them all for a day in
water, then I boiled that water down to a concentrated "essence of sumac", basically a light brown sour tasting liquid. Then I put the concentration is a jar in the fridge, thinking I'd use it sometime in the winter.
Now I KNOW there's gotta be some uses for a unique sour taste like that, but I just can't think of any. Anyone have any ideas?