Bread Pudding Souffle with Whiskey Sauce

Name: Bread Pudding Souffle with Whiskey Sauce
Ingredients: 3/4 cup sugar; 1 teaspoon ground cinnamon; Pinch freshly grated nutmeg; 3 medium eggs; 1 cup heavy cream; 1 teaspoon pure vanilla extract (use a high-quality extract, not an imitation); 5 cups day-old French bread, cut into 1-inch cubes, see note; 1/3 cup raisins; 1 1/2 cups heavy cream; 2 teaspoons cornstarch; 2 tablespoons cold water; 1/3 cup sugar; 1/3 cup bourbon; 9 medium egg whites, at room temperature; 1/4 teaspoon cream of tartar