Separate two eggs and place the egg whites in a clean, grease-free mixing bowl. Beat until soft peaks form. (Two egg whites will give you more meringue than you need, but it's easier to work with than one. If you don't mind though, you can halve the quantities for the meringue.)
Add 50 g granulated sugar and the seeds from ½ a vanilla pod, then beat again until the sugar has fully dissolved.
Sift in 30 g icing sugar, fold it in gently first (to avoid a sugar storm), then beat again until smooth and glossy.
Line a baking tray with baking paper. Using a piping bag, pipe small mounds of meringue onto the tray.
Bake for about 2 hours at 90°C, or until the meringues lift easily from the paper. Keep the temperature below 100°C to maintain their bright white colour.