Add the cranberries, sugar, and orange juice to a saucepan. Cook over medium heat until the cranberries burst and soften, around 10 minutes. 340 g cranberries , 200 g granulated sugar, 120 ml orange juice,
Blend the mixture until smooth in a blender and strain it through a fine mesh sieve to remove skins and seeds.
In a separate bowl, whisk the eggs, yolks, and salt. Slowly whisk in a few spoonfuls at a time of the warm cranberry puree to temper the eggs. 2 large eggs, 3 large egg yolks, Pinch of salt
Pour the tempered egg mixture back into the saucepan.
Cook over low heat, stirring constantly, until the curd becomes glossy, thick, and pudding like. It should reach 175 to 180°F (79 to 82°C) and form slow, heavy bubbles.
Remove from the heat and stir in the butter, orange zest, and vanilla. Let the curd cool for 5 to 10 minutes, then pour it into the cooled tart shell. 55 g unsalted butter, 1 to 2 tsp orange zest, 1 tsp vanilla extract
Chill for at least 4 hours or until fully set.