pour aquafaba in a completely clean bowl without any greasy residue. By using an electric whisk or a stand mixer beat the aquafaba until it starts to resemble beaten egg whites, but is still a bit unstable (takes about 5 minutes). At this point add vinegar and continue to beat until stiff peaks have formed (takes about another 5 minutes). To control if the mixture is stable enough, slowly turn the bowl upside down. If the mixture doesn’t start to slide around, you can begin adding the caster sugar and cornstarch;