Combine figs, 2 tablespoons sugar, juice, and a dash of salt. Cover and chill.
Cook milk in a heavy saucepan over medium-high heat to 180° or until tiny bubbles form around edge (do not boil). Remove from heat.
Combine remaining 10 tablespoons sugar, remaining dash of salt, and egg yolks in a bowl, stirring with a whisk. Gradually add half of hot milk to egg mixture, stirring constantly with a whisk. Return milk mixture to pan; cook over medium-low heat 5 minutes or until a thermometer registers 160°, stirring constantly. Place pan in an ice-filled bowl; cool custard mixture, stirring occasionally. Stir in sour cream and vanilla. Cover and chill.
Pour custard mixture into freezer can of an ice-cream freezer; freeze according to manufacturer's instructions. Stop machine and remove lid. Add fig mixture to freezer can. Replace lid; restart ice-cream freezer, and freeze 5 minutes or until set. Carefully drain liquid from bucket; repack bucket with ice and salt. Cover with kitchen towels; ripen at least 1 hour.
This was very interesting. You can definitely taste the sour cream. We don't have Brown Turkey figs where we live so had to substitute. The ice cream is fairly mild in flavor, & the sour cream makes it unusual.