In the top of 1-1/2-qt. double boiler, place melted butter; set aside. In a bowl, combine egg, milk, corn syrup, sugar, baking soda and spices. Mix until smooth. Stir in raisins and crumbs. Pour over melted butter. Add at least 3 in. of water to bottom of double boiler; cover and steam over medium-low heat for 1-1/2 hours. Meanwhile, for sauce, combine butter, sugar, water, egg and lemon juice in a saucepan. Bring to a boil over medium heat, stirring constantly. Add lemon zest. Serve sauce hot over warm pudding.