This recipe requires some advance preparation: The yogurt needs to drain for 12 hours.
This recipe can be prepared in 45 minutes or less but requires additional sitting time.
two 32-ounce containers whole-milk plain yogurt
1 vanilla bean
1 teaspoon finely grated fresh lime zest
6 tablespoons fresh lime juice
1/2 cup light corn syrup
3/4 cup superfine granulated sugar
In a cheesecloth-lined large sieve or colander set over a bowl drain yogurt, covered and chilled, 12 hours. Discard liquid in bowl.
With a knife halve vanilla bean lengthwise and scrape out seeds.
In a blender pur�e vanilla seeds, half of drained yogurt, and remaining ingredients.
In a bowl stir together vanilla mixture and remaining yogurt.
Transfer mixture to ice-cream maker and freeze.
Transfer frozen yogurt to an airtight container and put in freezer to harden.
Frozen yogurt may be made 1 week ahead.
Makes about 1 quart.