01 - Set the oven to 350°F (175°C) to prepare for baking.
02 - Pulse flour, powdered sugar, and salt in a food processor. Add cold cubed butter and pulse until coarse crumbs form. Incorporate egg yolk and ice water, pulsing until the dough just comes together.
03 - Press the dough evenly into a 9-inch tart pan with removable bottom, covering base and sides. Prick the base with a fork and freeze for 15 minutes.
04 - Line the chilled crust with parchment paper and fill with pie weights. Bake for 15 minutes, then remove weights and parchment. Bake an additional 10–12 minutes until golden brown. Let cool completely.
05 - Combine cranberries, sugar, water, orange zest, orange juice, and salt in a saucepan. Simmer over medium heat until berries burst, approximately 10 minutes.
06 - Blend the cooked cranberry mixture until smooth. Strain through a fine mesh sieve back into the saucepan, discarding solids.
07 - Whisk together egg yolks and whole eggs in a bowl. Gradually whisk a small amount of the warm cranberry mixture into the eggs to temper, then return the egg mixture to the saucepan.
08 - Over medium-low heat, stir constantly until the mixture thickens and coats the back of a spoon, about 5 to 7 minutes. Avoid boiling.
09 - Remove from heat and stir in unsalted butter pieces until the curd is smooth and glossy.
10 - Pour the cranberry curd into the cooled tart crust and smooth the surface. Refrigerate for at least one hour before serving.
11 - Optionally, decorate with fresh cranberries, a dusting of powdered sugar, or whipped cream as desired.