This lemon meringue pie with a biscuit base can be made the day before! You can make the entire pie and freeze it in an air-tight container. Because the filling is a custard base with condensed milk, it does not freeze solid and the freezer actually helps it retain a smooth consistency! In addition to that, the meringue will be frozen in place. When ready to serve, you can serve directly from the freezer with no thawing required!