For the meringues

Set the oven to 100ºC and line 2 baking sheets with parchment.  Combine the egg whites, sugar, vinegar and vanilla extract.  In the electric mixer, with the whisk attachment, beat the whites into stiff shiny peaks.  Using a piping bag, pie mounds of meringue 7cm in diameter and 7 cm high onto the baking sheets.  Bake for about 2 hours.  Cool to room temperature.

Summer Fruits

Prepare the fruit and add half the berries to a medium saucepan, add the sugar and lemon juice and simmer gently for 5 minutes.  Process the fruit mixture.  Set aside.

Cream Filling

Whisk the mascarpone, yoghurt and lemon rind together.

To serve

Tap the centre of each meringue to form a nest.  Warm the coulis in a saucepan.  Turn off the heat and add the remaining whole berries.  Spoon the cream filling into the centre of each meringue, followed by several spoonfuls of the fruit.