In a mixing bowl, combine flour and sugar for the crust. Add cold vegan butter and mix until crumbly. Add cold water, one tablespoon at a time, until the dough comes together.
Press the dough into a tart pan. Bake for 15 minutes or until golden brown. Let it cool.
In a saucepan, combine coconut milk, sugar, lemon juice, cornstarch, and lemon zest. Cook over medium heat until thickened, stirring constantly.
Pour the filling into the cooled crust. Top with fresh blueberries.
Chill in the fridge for at least 2 hours before serving.