My beets were slow to grow this year, so I bought a bunch at the farmers’ market. I was taken aback when the seller chopped off the vegetable’s foliage and attempted to discard it after handing me a sad sack of leafless roots. “Wait! I’ll take those, please,” I blurted, catching him just before they hit the trash bin, and explaining that they’re edible. He knew, of course, but said that most customers don’t want them. There are a lot of tasty and nutritious uses for secondary plant parts that