In a large bowl, add 1 cup cold water, sprinkle the gelatin on top and allow to dissolve. In the meantime, add the hot water and sugar to another bowl and stir together. Then add the white vinegar and stir until it dissolves. Pour the sugar mixture over the gelatin. Place in the freezer and stir occasionally until it thickens, about 30 minutes.
Serve with mayo and lemons.
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