This is a recipe for a yogurt soufflé cake that can be made with just four ingredients. It doesn't use cheese, milk, or butter, and is characterized by the tanginess and moderate sweetness of yogurt. The key is to whip the meringue until stiff peaks form and then gently fold it in without deflating it, resulting in a fluffy, juicy texture like something you'd find in a bakery. It's an easy recipe that only requires mixing and baking, making it the perfect treat for hot weather. After it has cooled down, chill it in the refrigerator for at least 3 hours before serving.