Eton Mess is a delicious jumble of crisp meringue, sweet cream, and fragrant strawberries. For my version of this classic British dessert, I use a foolproof Swiss Meringue baked into thin sheets, and layer it with white chocolate whipped cream and fresh berries.
Add the egg whites, sugar, and cream of tartar into a heatproof (glass or stainless steel) bowl of an electric mixer.
Add a few inches of water to a wide pot that's large enough to hold your mixer bowl. Turn on the heat, and float the bowl in the water. Slowly heat the egg whites, whisking them, until the mixture reaches 140 degrees F (about 60 degrees C).
Affix the bowl to an electric mixer fitted with the whisk attachment and add beat the eggs until they form a glossy meringue that holds soft peaks.
Add the vanilla and continue whisking until the meringue holds firm peaks.
Line a baking sheet with a silicone mat or parchment paper.
Spread the meringue into a thin, even layer on the baking sheet.
Bake the meringue until it's crisp (about 1 hour).
While you are waiting for the meringues, put the white chocolate in a heatproof bowl, along with 3 tablespoons of cream. Put the bowl over a pot of warm water and stir until the mixture is smooth and free of lumps. Let this cool slightly while you work on the cream.
Whip the remaining cream until soft peaks form. Add the melted white chocolate in two additions, and continue whipping until the cream is no longer pourable, but it is still soft. Refrigerate the cream until you're ready to assemble the Eton Mess.
When the meringue is crisp, allow it to cool enough to handle, and then gently separate it from the mat. Break the sheets into pieces that you can stack.
To assemble, layer the meringue, white chocolate mousse, and strawberries in a glass. Garnish with strawberries or mint. The Eton Mess should be eaten as soon as it's assembled.