This slightly bitter green develops a mellower flavor and nice char on a grill pan on the stove, or just a regular grill! Garnish with a little aged balsamic vinegar and a few Parmesan cheese shavings for a delicious side dish.
Less of a recipe, more of a preparation suggestion:
Quarter your clean radicchio, leaving the cores/stems intact. Brush with olive oil and season with salt and pepper. Grill on a hot pan for about 2 minutes per side, until nicely charred. Garnish with balsamic and Parmesan.