Once the meringue is ready and stiff (by step 3), add the coffee granules and mix just a drop more.
Preheat oven to 225°F (make sure oven is pareve or dairy). Line a baking sheet with parchment paper.
Fill a piping bag that has been fitted with a star-shaped tip with meringue. Pipe circles on prepared baking sheet. Start at the outer edge and go around and around until you fill the entire circle. Repeat until you have 8 or 9 circles. Bake for 1 hour. Shut off the oven and leave meringue inside to let it harden until cooled. Once cooled, store in a resealable plastic bag or freeze until ready to use.
Prepare the white chocolate cream. Chop the chocolate into very small pieces. Place inside a bowl (if using a standing mixer, place inside that bowl).
In a small saucepan, warm heavy cream until it starts to bubble on the sides. Do not bring to a boil. Pour the hot heavy cream over white chocolate and whisk by hand until combined and no chocolate lumps are visible. Place a piece of plastic wrap directly on the mixture and refrigerate for at least 3 to 4 hours.
Remove cream from the refrigerator. A thick layer will have formed at the surface, but that is normal. Remove the plastic wrap and discard. Using an electric mixer fitted with the whisk attachment, or a hand mixer, beat cream on medium speed. Be careful! This cream is not as forgiving. Due to the high fat content (the chocolate and the heavy cream), it will go very quickly from cream to a curdled mess, so keep watching it and keep the speed to a medium and not too high so that you can control it.
Once the whisk blade lines start to be visible and the cream has reached the consistency of frosting, stop. It is better to stop a minute too soon than to over mix.
Using a piping bag fitted with the star tip, pipe the ganache cream over all the meringues. Place each meringue in the freezer until ready to serve.
Once you are ready to serve the meringue cake, remove the meringues from the freezer and garnish with berries.
Stack the layers and serve.
Notes
Yields: Two small stacked cakes (four meringue rounds)