Preheat oven to 400°. Mix the egg yolk, cream and vanilla in a bowl. Pulse the walnuts in a food processor until finely ground. add flour, sugar, orange zest and salt and pulse to combine. Add the butter and pulse, then add the yolk mixture in a steady stream with the processor running. Pulse for another 10-20 seconds and transfer the mixture to a bowl.

Pour the crumb mixture into a 9-1/2-inch round fluted tart pan or a rectangular tart pan with a removable bottom. Firmly press the crumbs against the bottom and sides pan to form the crust. Prick the bottom of the crust all over with a fork and freeze for 10 minutes. Bake for about 15 minutes or until the bottom is set. Transfer to a cooling rack. Reduce the oven temperature to 350°.

Coarsely chop the cranberries and add to a bowl along with the pears and brandy, stirring to combine. In a separate bowl mix the sugar, flour, cardamom, ginger, cinnamon, and salt. Add to the cranberry-pear mixture, tossing to combine. Mound the filling into the par-baked crust.

Mix the flour, brown sugar and salt in a small bowl. Add the melted butter and vanilla. Combine with fingers until the mixture begins to clump together in small pieces when pressed. Sprinkle the streusel over the filling, breaking it into smaller pieces if necessary.