Thaw frozen pie crust for 45-60 minutes or until soft enough to unroll without breaking.
Preheat the oven to 425 degrees and line a baking sheet with parchment paper. Set aside.
Unfold the pie crust and coat with 2 tablespoons of olive oil, leaving 3 inches for the crust.
Using a mandoline, cut the potato into thin slices. Add the potatoes, salt, thyme and 1 tablespoon of olive oil to a medium bowl and evenly coat.
Add the potatoes to the pie crust, top with dollops of goat cheese and thyme. Fold the edges of the pie crust, overlapping to create a border. Brush the crust with an egg wash.
Bake for 30-35 minutes or until the pie crust is golden brown and the potatoes are brown.