Low FODMAP Viennese Farmer Cheese Cake - FODMAP Everyday

Ingredients

• ¾ cup (109 g) plus 2 tablespoons low FODMAP gluten-free all-purpose flour,
• ¼ cup (50 g) sugar
• ¼ teaspoon xanthan gum
• Pinch salt
• 7 tablespoons (99 g) unsalted butter, (at cool room temperature, cut into small pieces, plus extra)
• 2 large egg yolks; (save 1 egg white for the filling)
• Grated zest of ½ lemon
• Grated zest of ½ orange; optional
• ¼ teaspoon vanilla extract
• 1- pound (455 g) farmer cheese, ( such as Friendship brand, at room temperature)
• 1 cup (240 g) lactose-free sour cream, (at room temperature)
• ¾ cup (149 g) sugar, (divided)
• ¼ cup (60 ml) lactose-free whole milk; (at room temperature, optional)
• 2 tablespoons cornstarch
• 2 teaspoons vanilla extract
• ¼ teaspoon salt
• 4 large eggs; (separated, plus 1 large egg white (saved from crust), at room temperature)
• ¼ cup (22 g) sliced blanched almonds
• ¼ cup (52 g) plump raisins; (plumped with 1 ½ tablespoons Grand Marnier as an option)