saveur.com
A Midsummer's Dream
FROM ISSUE #166 The soil on the Swedish island of Oland, off the mainland's southeastern coast in the Baltic Sea, has special powers. So says my gardener friend Asa Johanson, who lives here. "Anything you plant just explodes!" she exclaims, holding up an intensely green and purple kohlrabi that looks like a starburst, its root boasting a crown of thick leaves that radiate in all directions. It's an early June morning, and we are gathering vegetables for a lunchtime feast to commemorate…