Crostata & Tart Crust - FODMAP Everyday

Ingredients

• 1 large egg, (cold)
• 3 tablespoons ice water
• 1/4 teaspoon cider vinegar
• 1 1/4 cups (181 g) Bob’s Red Mill Gluten-Free 1 to 1 Baking Flour
• 1 1/2 teaspoons sugar
• 1/2 (Scant) teaspoon xanthan gum ((see Tips))
• 1/4 teaspoon salt
• 1/2 cup (1 stick; 113 g) cold unsalted butter, (cut into small pieces)