Without looking for veggies that don&#x27;t need pollinators, in a pinch, sprout your grain, although that won&#x27;t take care of your Vitamin C requirement.  Better, as some POWs held by the Japanese in WWII did, use a bacteria or mold to convert the starch to sugar, then culture yeast in that.  By the end of the war, they were healthier than their guards.