Preheat the oven to 375°F. Roll out the pie crust slightly larger than 10 inches on wax paper and refrigerate while prepping the apples.
In a 10-inch stainless steel skillet, melt 8 tablespoons of butter over medium heat. Stir in 1 cup of sugar—it will start grainy but will dissolve into a syrupy liquid.
Once bubbling, add the apples and sprinkle with 1/8 teaspoon salt. Cook, stirring every few minutes, until the sauce turns deep amber, about 12 to 15 minutes.
Remove from heat. Arrange the apples so their rounded sides face down in the pan.
Place the chilled pie crust over the apples, tucking the edges in and pricking the crust with a fork.
Bake for 20-25 minutes until the crust turns golden brown.
Cool on a rack for 10-20 minutes, then run a knife around the edges to loosen.
Place a plate over the skillet, flip, and carefully lift the skillet. Rearrange any apples if needed and drizzle extra caramel sauce on top. Serve warm!