The North Fork food community is a practical, inventive bunch. From creating chicken coops from wine barrels to using local beer for cheesemaking, members show how a local food economy should be – small, integrated and sustainable. Often, one person’s waste is another’s treasure. So I was not surprised to hear recently that Greenport Harbor Brewing is doing some pretty cool things with their spent grain. For those unaccustomed to brewing, malted grain is the key ingredient used as the starch in beer. That grain is soaked and put through a series of steps to break down its sugars for…