Grape-Nuts Ice Cream

Directions

1. 1
   In a large metal bowl with an electric mixer beat together yolks and sugar until pale yellow and thick.
2. 2
   In a metal bowl set over a pan of simmering water heat 2 cups heavy cream until warm.
3. 3
   Add warm cream to yolk mixture in a slow stream, whisking constantly.
4. 4
   Set bowl with custard over simmering water and cook, stirring constantly with a wooden spoon, until a thermometer registers 170F.
5. 5
   Remove bowl from heat and stir in remaining cup cream.
6. 6
   Chill custard until cold, about 1 hour.
7. 7
   Add Grape-Nuts and vanilla to custard and freeze in an ice-cream maker.
8. 8
   Transfer ice cream to an airtight container and put in freezer to harden.
9. 9
   Ice cream may be made 1 week ahead.