Ginger Ice Cream

Preparation In a large bowl lightly whisk yolks. In a 3-quart heavy saucepan cook sugar, fresh gingerroot, and water over moderate heat, stirring occasionally, 5 minutes. Add half-and-half and bring to a simmer. Add hot half-and-half mixture to yolks in a slow stream, whisking, and pour into pan. Cook custard over moderately low heat, stirring constantly, until a thermometer registers 170°F. (Do not let boil.) Pour custard through a sieve into cleaned bowl and stir in cream and vanilla. Cool custard. Chill custard, its surface covered with plastic wrap, until cold, at least 3 hours, and up to 1 day. Finely chop crystallized ginger. Freeze custard in an ice-cream maker, adding crystallized ginger three fourths of way through freezing process. Transfer ice cream to an airtight container and put in freezer to harden. Ice cream may be made 1 week ahead.

Preparation In a large bowl lightly whisk yolks. In a 3-quart heavy saucepan cook sugar, fresh gingerroot, and water over moderate heat, stirring occasionally, 5 minutes. Add half-and-half and bring to a simmer. Add hot half-and-half mixture to yolks in a slow stream, whisking, and pour into pan. Cook custard over moderately low heat, stirring constantly, until a thermometer registers 170°F. (Do not let boil.) Pour custard through a sieve into cleaned bowl and stir in cream and vanilla. Cool custard. Chill custard, its surface covered with plastic wrap, until cold, at least 3 hours, and up to 1 day. Finely chop crystallized ginger. Freeze custard in an ice-cream maker, adding crystallized ginger three fourths of way through freezing process. Transfer ice cream to an airtight container and put in freezer to harden. Ice cream may be made 1 week ahead.