Whip the egg whites on the lowest speed of mixer, until just foamy.
Slowly add sugar #1 to the mixer and continue to whip on low speed.
In a small sauce pan, combine the sugar #2, water and glucose.
Cook the sugar syrun to 115C.
Increase the speed of the mixer to medium, and slowly stread the hot sugar syrup into the bowl.
Add the vanilla extract.
Gradually increase the speed of the mixer to high speed. Whip the meringue until it is glossy, cool, and quadrupled in volume.
Use immediately or store in the freezer until ready to use.
When the Ruby Ganache is set on the tarts and ready to decorate:
Transfer the Italian Merignue to a pastry bag fitted with a rose petal pastry tip.
Pipe decoration over the top of the tart, as desired.
Lightly torch the merigue, if desired.
Garnish with fresh grapefruit segments, if desired.
Store in refrigerator until ready to serve.