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1
Score grapefruit, oranges, and lemons through peel from top to bottom in 6 sections for grapefruit and 4 for oranges and lemons (don't cut into fruit). Pull off strips of peel with your fingers. Slide a small, sharp knife along inside of peels to remove excess membrane so peels are about 1/4 in. thick. Cut peels lengthwise into strips about 1/2 in. wide in center and tapered on ends.
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2
Put peels in a 3- to 4-qt. saucepan and add cold water to cover. Bring to a boil, then drain. Repeat twice more.
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3
Refill pan with 2 1/2 cups water and 2 1/2 cups sugar; bring to a boil, making sure that sugar dissolves. Add peels and bring to a boil, then reduce heat and simmer gently, stirring occasionally, until peels turn translucent and syrup begins to form bigger bubbles, about 1 1/2 hours.
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4
Drain peels, saving syrup for other uses (such as topping pancakes) if you like. Spread peels on a nonreactive cooling rack set on a parchment-lined baking sheet. Allow peels to dry completely, about 2-3 hours.
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5
Toss peels in remaining 1 cup sugar, shaking off excess. Store airtight at room temperature. Serve peels plain or dipped in chocolate.
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6
*Melt 10 oz. chopped bittersweet or semisweet chocolate in a small pan over barely simmering water. Dip peels halfway into chocolate; set on baking sheets lined with waxed paper. Chill until set, about 30 minutes.
