Creamy Oyster Soup from Soup: A Way of Life by Barbara Kafka

Ingredients

• 3 generous pinches saffron threads
• 2 teaspoons kosher salt
• 3 dozen oysters, shucked, with their liquid
• 1¼ pounds (575 g) mashing potatoes, peeled and cut into ¼-inch (.5-cm) dice
• 4 cups (1 l) Basic Fish Stock
• 1 cup (250 ml) heavy cream
• 1 medium bunch scallions, trimmed and thinly sliced across