Do you make your own kombucha? How about kimchee? Or would you prefer to purchase kombucha or kimchee from some random person who perhaps like yourself messes around in the kitchen? Greenpoint Food Market, which encourages “DIY methods of food production,” is hosting an open call for vendors: “GFM is currently registering food-makers, musicians, and artists releasing all forms of food expression.” Vendor registration starts at $40. Express your food beginning at noon on Saturday, September 12, at Church of the Messiah (129 Russell Street, near Nassau Avenue).