1. Bring a large pot of water to a boil. Core tomatoes; discard cores. Place tomatoes in boiling water for 15 seconds. Plunge tomatoes into ice water; drain. Peel; arrange skins flat on a jelly-roll pan. Cut peeled tomatoes into 1/2-inch-thick slices; arrange on a platter.
2. Heat 1/4 cup oil in a small skillet over medium-high heat. Add half of skins to oil; cook 2 minutes or until crisp, turning occasionally. Drain on a paper towel; repeat procedure with remaining skins. Discard oil in pan. Sprinkle skins with 1/8 teaspoon salt.
3. Drizzle tomatoes with remaining 1 tablespoon oil; sprinkle with remaining 1/4 teaspoon salt and pepper. Top with tomato skins and arugula.
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