Burnt Peach Ice Cream

The slightly burnt taste lifts this from the ordinary - if you can call the summer taste of fresh peaches ordinary!

2 cups half-and-half
1 cup whipping cream
1/2 cup granulated sugar
1/2 cup peach preserves (not jelly)
1 vanilla bean, split and scraped
Pinch kosher salt
4 medium peaches, halved, pitted and grilled
    or broiled until brown

Combine all ingredients but peaches (include the bean and its pulp) in a large saucepan and place over medium heat. Attach a frying or candy thermometer to inside of pan. (see note below)

Stirring occasionally, bring the mixture to 170