Winter is chicory season. Chicories are the often-labeled bitter greens, which include radicchio, endive, puntarelle, and escarole. Bunches and heads of chicory are prolific throughout the season, difficult to miss with their with dramatic frilly, spiky, and cone-headed leaves. And while their bitterness can be off-putting to some, at winter’s peak, chicories are crisp, juicy,…