Low FODMAP Mixed Berry Slab Pavlova - FODMAP Everyday

Ingredients

• 4 large egg whites
• ¼ teaspoon cream of tartar
• 1 cup (198 g) sugar; (use superfine if you have it)
• 1 teaspoon vanilla extract
• 1 ¼ cup (163 g) fresh blackberries
• 1 ¼ cup (157 g) fresh raspberries
• ½ cup (120 ml) plus 2 teaspoons water, (divided)
• 1/3 cup (65 g) sugar
• 2 teaspoons freshly squeezed lemon juice
• 1 tablespoon cornstarch
• 1 cup (255 g) thick, plain lactose-free yogurt, (such as Siggi’s, chilled)
• ¾ cup (180 ml) lactose-free heavy cream, (chilled)
• 2 tablespoons confectioners’ sugar; (optional)
• ¼ cup (40 g) fresh blueberries
• 12 blackberries
• 4 strawberries, (hulled and sliced)