In a mixing bowl, combine the flour, melted coconut oil, and maple syrup. Mix until a dough forms.
Press the dough evenly into a tart pan. Bake for 10-12 minutes, or until lightly golden. Let it cool.
In a saucepan, combine the coconut cream, lemon juice, maple syrup, cornstarch, and lemon zest. Cook over medium heat, whisking constantly until thickened.
Pour the filling into the cooled crust. Refrigerate for at least 2 hours before serving.