You blind bake it.

Yes

Bake blind is the process of baking a pie crust or other pastry without the filling. For instance, if the filling could not to be cooked: a cream filling, for example, the filling is put into the empty baked case afterwards.

Blind baking a pastry case stops the pastry blistering, or rising to form an uneven base.

If it is a medium sized pastry it should be blind baked for 15mins at 200 degrees but if it is pastry with sugar o the temperature for less hope this is helpful even though its not alot :)