Grease and line 2 large baking trays with parchment paper.
Using an electric mixer, beat egg whites in a small bowl until soft peaks form. Add caster sugar and vanilla; beat until sugar dissolves.
Transfer mixture to a large bowl. Fold in almond meal and sifted icing sugar, in 2 batches.
Spoon mixture into a piping bag fitted with a plain nozzle. Pipe rounds on prepared trays, leaving room for spreading; smooth tops. Stand for 30 minutes.
Preheat oven to 300°F. Bake for 20-25 minutes or until dry to touch but not colored. Cool on trays.
For the ganache, place Chocolate and cream in a small heavy-based saucepan. Cook and stir over low heat for 1 minute or until chocolate is just melted. Chill for 2 hours or until cold and thick. Before using, beat well with a wooden spoon.
Sandwich macarons with 2 teaspoons of the ganache. Serve.
Recipe by at https://www.livinglifegingerly.com/recipe-styling-macarons/