Custard Strudel

Ingredients

• 1/2 cup (99 grams) granulated sugar
• Zest of 1 orange
• Zest of 1 lemon
• 1 vanilla bean, halved and seeds scraped
• 1/2 cup (113 grams) unsalted butter, at room temperature
• 6 ounce (170 grams) cream cheese, at room temperature
• 1 large (56 grams) egg, at room temperature
• 1/4 cup (30 grams) all-purpose flour
• 1/3 cup (75 grams) sour cream
• 1/2 teaspoon (2 grams) vanilla extract
• 1 recipe prepared and rested Strudel Dough (https://food52.com/recipes/86864-best-strudel-dough-recipe)
• 6 tablespoon (85 grams) unsalted butter, melted (divided)
• 2 (113 grams) eggs, at room temperature
• 2 large (43 grams) egg yolks, at room temperature
• 1/3 cup (71 grams) light brown sugar
• 2/3 cup (150 grams) whole milk
• 2/3 cup (155 grams) heavy cream
• 1 teaspoon (5 grams) vanilla extract
• 1/2 teaspoon (2 grams) fine sea salt