To release the min'ts fragrant oils, gently press or crush it with a spoon.
Combine all ingredients in a large saucepan; bring to a boil. Reduce heat, and simmer 7 minutes. Discard mint sprigs.
Place mixture in a blender or food processor; process until smooth. Pour into a bowl; cover and chill.
Pour chilled mixture into the freezer can of an ice cream freezer; freeze according to manufacturer's instructions.
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