Bread Pudding Soufflé with Whiskey Sauce

Name: Bread Pudding Soufflé with Whiskey Sauce
Cuisine: American
Ingredients: Butter and sugar for the mold; 4 eggs, separated and at room temperature; 1 teaspoon vanilla extract; ¼ teaspoon cinnamon; ¼ teaspoon freshly grated nutmeg; 4 cups milk; Pinch of salt; ½ cup sultanas, soaked in enough dark rum to cover; ½ cup sultanas, soaked in enough dark rum to cover; ½ cup chopped pecans; 5 cups day-old French bread (from a large loaf, not a baguette), cut into 1-inch cubes; 5 cups day-old French bread (from a large loaf, not a baguette), cut into 1-inch cubes; 5 cups day-old French bread (from a large loaf, not a baguette), cut into 1-inch cubes; 1 cup heavy cream; 2 egg yolks, at room temperature; 2 tablespoons sugar; ¼ cup bourbon