Method
This is the perfect cake for a celebration! It takes a bit of time to make, but it's definitely worth it.
1. Add egg whites to a steel or glass bowl. Whisk slowly with a pinch of salt until they start to foam. Then carry on whisking at a higher speed until the egg whites become stiff.
2. Gradually add sugar until all the sugar is dissolved and the mixture looks like shiny shaving foam. Don't over-whisk the mixture, as it will then become grainy.
3. Sieve corn starch and add white wine vinegar. Use a spatula to carefully fold the mixture and incorporate all the ingredients.
4. Line a tray with baking parchment and spread the merengue mixture evenly onto it. Make sure to leave a few centimetres of space around the cake.
5. Bake the meringue at the bottom of the oven for about 90 minutes at 120 degrees Celcius. Turn off the oven and let the meringue rest inside it until it's completely cool. Feel free to leave it overnight with the oven door ajar.
For the cream:
6. Add egg yolks, milk, sugar, and corn starch to a pot. Cut the gelatin sheets into smaller pieces and add them to the pot too.
7. Heat up the mixture while stirring constantly. Let it thicken. Once it has the texture of custard, remove the mixture from the heat and pour it into a bowl to cool.
Tip: Remove the pot from the heat if the mixture thickens too quickly to make sure that it doesn't separate. You can always put it back on the heat if it needs to thicken more.
8. Whip double cream and fold it into the egg cream. Spread the cream onto the merengue and decorate it to your heart's content with fresh berries, mint, and powdered sugar.
Tip: You can bake the merengue several days before serving as long as you store it in a dry place and cover it with some baking parchment. It's also best to decorate the cake right before serving.