Pre-heat your oven to 180C / 350F / gas mark 4.
Line two baking sheets with baking paper.
In a large bowl, whisk together the aquafaba and cream of tartar until it forms soft peaks.
Add the caster sugar a spoonful at a time, whisking well after each addition. Continue to whisk until the meringue is thick and glossy and forms stiff peaks.
In a separate bowl, mix together the dry ingredients (flour, semolina, cornflour and baking powder).
Add the dry ingredients and fold through very gently.
Finally fold in the oil and vanilla paste.
Spoon the batter into a piping bag with a large round nozzle.
Pipe lines of the batter on the baking sheets, about 2.5 cm (1 in) wide and 8-10 cm (3-4 in) long. Make sure to leave room for them to spread.
Bake for 15-20 minutes until golden.
Once baked, turn them out on to a wire rack and leave to cool completely.