Prepare the Oven
Preheat your oven to 425°F (220°C). A hot oven helps caramelize the radiccio and reduces its natural bitterness while creating delicious crispy edges.Prepare the Radiccio
Remove any wilted outer leaves from the radiccio heads. Slice each head into four wedges, keeping a portion of the core attached so the wedges stay together during roasting.Make the Seasoning Mixture
In a small bowl, combine olive oil, minced garlic, sea salt, and black pepper. Stir until evenly mixed.Season the Radiccio
Arrange the radiccio wedges on a baking sheet with the cut sides facing up. Brush the olive oil mixture generously over all exposed surfaces.Roast Until Tender
Place the baking sheet in the preheated oven and roast for 15–20 minutes. Turn the wedges once halfway through cooking. The leaves should become tender with slightly browned and caramelized edges.Add the Finishing Touches
Remove the radiccio from the oven and immediately drizzle with balsamic vinegar. If you prefer a slightly sweeter flavor, drizzle with honey as well.Garnish and Serve
Sprinkle the roasted radiccio with freshly grated Parmesan cheese and chopped parsley. Serve warm with lemon wedges for an extra burst of freshness.