When it gets bone-chilling cold outside, I can’t help but want to eat beans. Lots of beans. Navy bean soups. Rice and red merlot beans. Yellow eyed beans and sauteed greens. Pinto beans with bacon, smothered in cheese. I used to work for Cayuga Pure Organics, a farm in Ithaca, NY, that brings their exceptional beans to the Union Square Greenmarket on Saturday.