Preheat your oven to 375°F (190°C).
In a mixing bowl, combine flour and vegan butter. Mix until crumbly.
Add ice water, one tablespoon at a time, until dough forms. Press into a pie dish.
Bake crust for 15 minutes. Let cool.
In a saucepan, combine sugar, water, lemon juice, cornstarch, and lemon zest. Cook until thickened.
Pour filling into the cooled crust.
In a mixing bowl, beat aquafaba and cream of tartar until soft peaks form. Gradually add sugar and beat until stiff peaks form.
Spread meringue over the filling. Bake for 10 minutes or until meringue is golden.
Let pie cool before serving.