My friend Anna adapted two recipes to create this one. The crust is taken from a 2005 recipe published in Gourmet. The pie filling and streusel topping were published in 1994 in Bon Appetit.
The crystallized ginger can be a little hard to find. Trader Joe's has started carrying it in their dried fruits section. It can often be found at Whole Foods in the baking aisle as well. The pie is best if made a day ahead so that the flavors can mellow. This is wonderful just as it is, but even better with fresh whipped cream.
Recipe by MyUntangledLife.com at https://myuntangledlife.com/annas-double-ginger-pumpkin-pie/