Lemon-Mint Sorbet

Combine sugar, mint and lemon zest in a large glass measuring cup or medium bowl. Pour boiling water over the sugar mixture, stirring to dissolve. Let steep for 20 minutes, then strain through a fine sieve into a bowl. Stir in lemon juice. Chill until cold.

Pour into the canister of an ice cream maker and freeze according to the manufacturer's directions. (Alternatively, freeze the mixture in a shallow metal cake pan until solid, about 6 hours. Break into chunks and process in a food processor until smooth.)