Bastani Sonnati
Milk and cream warm with sugar; saffron blooms in milk separately; egg yolks whisk with sugar to ribbons. The hot milk tempers into the yolks; the custard cooks back to coat-the-spoon thickness; off the heat, rosewater, saffron-milk and a pinch of mastic powder fold in. Cooled custard goes into the ice cream churn. As it freezes, ribbons of separately-frozen cream and chopped pistachios fold through.