Place in a small cup:
Sprinkle with:
Let stand for 5 minutes to soften. Combine in a small saucepan:
Bring to a boil, stirring to dissolve the sugar. Boil, covered, for 5 minutes without stirring. Add:
Dissolve the gelatin in the heated syrup. Refrigerate the sherbet base until cold, overnight if possible, or quick-chill in an ice water bath.
Puree in a food processor:
Strain through a fine-mesh sieve into a bowl. Stir in the gelatin mixture. Pour the base into an ice cream maker and freeze as directed. Serve immediately or transfer to a container with a tight-fitting lid and freeze.