This is a recipe for pavlova, a dessert originating in Australia and New Zealand, made by baking meringue. The meringue is made by whipping egg whites and mixing in sugar, vanilla, vinegar, and cornstarch. The meringue is then baked slowly at a low temperature, and topped with whipped cream and plenty of fresh strawberries and blueberries. It's a visually appealing dessert with a crispy yet fluffy texture.