Pour milk into a small metal mixing bowl, place mixer beaters in the bowl. Cover and refrigerate for at least 2 hours or overnight. Line the sides of a 9-inch springform pan with ladyfingers; set aside. In a large bowl, dissolve gelatin in orange juice. Stir in the sugar, lemon juice and peel; cool to room temperature.
Beat chilled milk until soft peaks form; fold into gelatin mixture. Pour into prepared pan. Refrigerate for a least 3 hours or until firm. Spread with whipped topping. Remove sides of pan. Refrigerate leftovers.
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