Macadamia Nut and Bittersweet Chocolate Ice-Cream Bombe with Macadamia Nut Praline

In a heavy skillet melt the butter over moderate heat and in it cook the macadamia nuts, stirring, until they are light golden. Transfer the nuts with a slotted spoon to a small bowl, reserving the butter, and let them cool. In a large metal bowl whisk together the eggs, the sugars, the cream, the milk, the salt, and the reserved melted butter, transfer the mixture to a large saucepan, and cook it over moderately low heat, stirring until it registers 175 °F. on a candy thermometer. Return the mixture to the metal bowl, cleaned, and chill it until it is cold. Freeze the mixture in an ice-cream freezer according the manufacturer's instructions, adding the macadamia nuts, patted dry, when it is frozen partially. Makes about 1 quart.