01 - Preheat the oven to 350°F.
02 - In a food processor, pulse flour, powdered sugar, and salt. Add cold butter and pulse until mixture resembles coarse crumbs. Add egg yolk and ice water, pulsing until dough just comes together.
03 - Press dough evenly into a 9-inch tart pan with removable bottom, covering base and sides. Prick base with fork.
04 - Freeze crust for 15 minutes. Line with parchment and fill with pie weights. Bake for 15 minutes; remove weights and parchment, then bake 10–12 minutes more until golden. Cool completely.
05 - Combine cranberries, sugar, water, orange zest, orange juice, and salt in a saucepan. Bring to a simmer over medium heat and cook until cranberries burst, about 10 minutes.
06 - Puree mixture using blender or immersion blender until smooth. Strain through fine mesh sieve into saucepan, discarding solids.
07 - Whisk eggs and yolks in a bowl. Slowly whisk a small amount of warm cranberry mixture into eggs, then pour egg mixture back into saucepan.
08 - Cook over medium-low heat, stirring constantly, until thickened and curd coats back of spoon, about 5–7 minutes without boiling.
09 - Remove from heat and stir in butter until smooth and glossy.
10 - Pour cranberry curd into cooled crust and smooth top.
11 - Chill tart at least 1 hour before serving. Garnish with fresh cranberries, powdered sugar, or whipped cream as desired.