Radicchio comes into its own in mid-winter and early spring, making it a particularly welcome ingredient when there's not much else around. Radicchio has a slight bitterness that mellows when it's cooked, and it pairs beautifully with eggs, rice, and cheese. Try Radicchio and Red Onion Risotto, use it in classic Frittata di Radicchio, or in a colorful Chopped Salad with broccoli, almonds, and egg.