Instructions: In a large saucepan combine the blueberries, the sugar, the zest, and 1/4 cup water, boil the mixture, covered, for 5 minutes, stirring occasionally, and simmer it, uncovered, for 5 minutes. Discard the zest and puree the mixture in batches in a blender or food processor. Transfer

the puree to a bowl and whisk in the Grand Marnier, the lemon juice, the vanilla, the salt, the heavy cream, and the half-and-half. Force the mixture through a very fine sieve set over another bowl and chill it, covered, for 1 hour, or until it is cold. Freeze the mixture in an ice-cream freezer according to the manufacturers instructions.

Makes about 1 1/2 quarts.

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