Preheat grill. Brush radicchio leaves with 1 tablespoon oil and season with salt and pepper. Grill leaves 2 minutes per side, until softened and lightly browned. Set aside to cool.
Preheat broiler. Season scallops with salt and pepper. Heat remaining 1 tablespoon oil in a saute pan, preferably nonstick, over very high heat and briefly sear scallops on both sides. Wrap scallops in grilled leaves, place seam-side down in a shallow baking dish, and top with seasoned bread crumbs; broil just until bread crumbs brown. Meanwhile, in a saucepan heat pancetta until brown and crispy; stir in zest, vinegar and olive oil and heat until warmed through; season to taste with salt and pepper. To serve, top 2 radicchio cups per serving with warm vinaigrette and garnish with parsley.
Yield: 4 servings