Creamy Saffron Custard with White Chocolate and Pistachio

Name: Creamy Saffron Custard with White Chocolate and Pistachio
Ingredients: 6-8 threads saffron; 9-12 pods green cardamom, (depending on potency. If newly purchased, you may want to use the lesser amount). husks removed and seeds pounded in a mortar and pestle along with the toasted saffron (see step 2, below); 1/3 cup organic, granulated sugar; 3/4 cup cornstarch; 3-1/2 ounces fine quality white chocolate, finely chopped; 5-1/2 cups 2% or whole milk; 1 pinch salt; 1 to 1-1/2 teaspoons orange-flower water; chopped, toasted pistachios as garnish