Grilled radicchio with olive oil transforms bitterness into smoky, sweet depth. This vegetarian mediterranean side is fresh, healthy, and a keto-friendly family accompaniment rich in antioxidants.
Preheat a grill or grill pan to medium-high heat (about 400°F), brushing the grates lightly with oil.
Trim the stems and any tough outer leaves from the radicchio. Cut each head into 4 wedges, keeping the core intact to hold them together.
Brush radicchio wedges on all sides with olive oil and season them evenly with kosher salt and black pepper.
Place the wedges cut-side down on the grill. Cook, turning occasionally, for 6–8 minutes or until slightly charred and tender, but not mushy.
Remove grilled radicchio to a platter and drizzle with balsamic vinegar immediately before serving. Serve warm or at room temperature.