01 - Whisk together lemon juice, lemon zest, sugar, cornstarch, coconut cream, turmeric, and salt in a small saucepan until completely smooth. Place over medium heat and cook, whisking continuously, until mixture thickens and begins to bubble, approximately 3 to 4 minutes. Remove from heat immediately, transfer to a clean bowl, and allow to cool completely. Refrigerate for at least 30 minutes to achieve optimal spreading consistency.
02 - In a large mixing bowl, beat solid coconut oil and cane sugar together until light and creamy, approximately 2 to 3 minutes. Add applesauce, lemon zest, lemon juice, and vanilla extract. Mix until thoroughly incorporated and smooth.
03 - In a separate medium bowl, whisk together gluten-free flour blend, almond flour, cornstarch, sea salt, and baking soda until evenly distributed.
04 - Gradually add dry ingredients to wet ingredients, mixing gently until a soft dough forms. Divide dough into two equal portions, shape each into a flat disc approximately 1 inch thick, wrap tightly in parchment paper, and refrigerate for 30 minutes to firm.
05 - Preheat oven to 350°F. Line two large baking sheets with parchment paper and set aside.
06 - Remove one dough disc from refrigerator. On a lightly floured surface using gluten-free flour, roll dough to 1/4-inch thickness. Using a 2-inch round cookie cutter, cut out rounds and transfer to prepared baking sheets, spacing 1 inch apart. Repeat with remaining dough disc, combining scraps and rerolling as needed.
07 - Bake cookies for 10 to 12 minutes, or until edges are just beginning to turn golden. Remove from oven and allow cookies to cool on baking sheets for 5 minutes before transferring to a wire rack to cool completely.
08 - Once cookies are completely cooled, spread 1 to 2 teaspoons of chilled lemon curd onto the flat side of half the cookies. Top with remaining cookies, flat side down, pressing gently to form sandwiches. Optionally dust tops with powdered sugar before serving.