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1
Mix lemon slices, lemon juice, and coarse sea salt in small skillet. Bring to boil; reduce heat to medium-low, cover, and simmer until almost tender, about 10 minutes. Uncover and cool. Drain lemon slices. Using sharp knife, cut slices in half, then cut pulp away from peel; discard pulp. DO AHEAD:
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2
Mix cheese, lemon juice, garlic, minced anchovies, and pinch of sugar in medium bowl. Whisk in olive oil and 1 1/2 teaspoons oil from anchovy tin. Season vinaigrette to taste with salt and pepper. DO AHEAD:
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3
Preheat oven to 350u00b0F. Line rimmed baking sheet with foil. Mix 1 tablespoon olive oil and garlic in medium bowl. Add bread cubes, oregano, and crushed red pepper; sprinkle with salt and pepper. Transfer bread cubes to prepared baking sheet.
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4
Bake bread cubes until golden brown, tossing occasionally, about 20 minutes. Cool. Transfer to work surface. Cover with paper towels. Using mallet or rolling pin, crush bread cubes into breadcrumbs.
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5
Preheat broiler. Line same baking sheet with fresh sheet of foil. Place radicchio wedges in large bowl. Drizzle remaining 3 tablespoons oil over; sprinkle with salt and pepper and toss to coat. Arrange wedges on prepared sheet. Broil until beginning to brown, about 3 minutes. Using tongs, turn radicchio over, fanning leaves out slightly. Broil until radicchio is soft and beginning to brown with some edges beginning to char, watching carefully to prevent burning, about 2 minutes longer.
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6
Return radicchio to same large bowl. Drizzle enough dressing over to coat; toss. Arrange wedges on plates. Sprinkle breadcrumbs over. Top with cheese shavings, arrange a few preserved lemon peel strips over, and serve.
