My Grandmother's Bake Creamy Custard Tarts

Ingredients

• 1 ½ cups all-purpose flour (190g)
• ½ cup unsalted butter, cold and cubed (115g)
• ¼ cup granulated sugar (50g)
• 1/4 teaspoon salt
• 4-5 tablespoons ice water (60-75ml)
• 1 ½ cups whole milk (360ml)
• 1 cup heavy cream (240ml)
• ¾ cup granulated sugar (150g)
• 1 tablespoon cornstarch (8g)
• 1 teaspoon vanilla extract
• 3 large egg yolks
• Zest of 1 lemon