Somewhere, in some kitchen, someonewith unused custard they didn't want to waste, decided that sugar,apples and cinnamon buried in a crust - called a coffin in merry oldEngland - made too plain a dessert for a forward looking nation. So,they took the custard and poured it over the apples only to discoverthey had created another problem. The crust used to cover the applesmade no sense with a custard filling. Fortunately, American ingenuitysurfaced and deduced that a crumbly streusel with a gazillion calorieswould be a perfect topper for the pie. That's my take on how applecustard pie with streusel topping came to be. I hope you'll take itwith a grain of salt.