Pavlova with Berries and Lemon Curd Whipped Cream

Name: Pavlova with Berries and Lemon Curd Whipped Cream
Ingredients: 250 grams egg whites, at room temperature; 250 grams granulated sugar; 125 grams powdered sugar; Large pinch fine sea salt; 1/2 cup lemon juiceplus zest from 2 lemons; 8 large egg yolks; 1 cup granulated sugar; 1/4 vanilla pod, seeds scraped; 10 tablespoons cold unsalted butter, cubed; Pinch fine sea salt; 1 quart cold heavy cream; 2 cups mixed berries, like raspberries and blueberries, for serving; Powdered sugar, for dusting