Remove the dough from the refrigerator. Let the dough rest at room temperature for 15 minutes. After 15 minutes, place the dough on a piece of floured parchment paper. Using a rolling pin, pound out the middle a few times to flatten the dough while lifting and rotating. If the dough starts to crack, gently push it back together. Place another piece of parchment paper on top.
Roll out the dough. Gluten-free dough can be sticky so I recommend rolling it out between 2 large pieces of parchment or plastic wrap. This makes it much easier to roll and transfer to the pan. Start in the center and roll outward, rotating 90 degrees every few rolls. Roll the dough to ¼" thick and about 10-11" wide. Remove the top layer of parchment paper and brush off any excess flour.
Transfer the dough to the pan. Place one hand under the remaining parchment paper and carefully flip the dough over the top of the pan. Peel off the remaining parchment paper. Gently lift the edges of the dough to drop it to the bottom of the pan.
Form the dough into the pan. Using light pressure, press the dough into the pan. If it tears, just patch it back together. You can also add a little flour to the bottom of a measuring cup and gently push the cup along the edges and center to help flatten the dough.
Trim the excess pastry. Gently press the dough against the sides of the pan. Run a sharp knife around the edges of the pan to trim any excess dough. Use the excess pieces of dough to cover any visible spots.
Dock and freeze. Using a fork, dock the shortcrust pastry in several places. Cover the pastry with plastic wrap and place it in the freezer for 30 minutes. If using this crust with a filling that bakes in the shell, follow the instructions in the tart recipe. If using a no-bake filling, follow the instructions below for blind-baking the crust.