Prepare the pie crust according to package instructions. Roll the dough out between 2 pieces of waxed paper to 1/4-inch thickness. Invert a heavy bottom 10-inch nonstick skillet over the dough, trace the outside edge of the pan and trim the excess. Put the pie dough on a sheet tray, cover it in plastic wrap and refrigerate.
Preheat oven to 375 degrees F.
Slice each apple in 2 and place the halves in a bowl of water with a bit of lemon juice to keep them from browning. In a small bowl, combine the sugar with 2 teaspoons of pumpkin pie spice and the salt.
Put the same skillet used to measure out the pie crust, over medium-high heat, and add the butter. Sprinkle 3/4 of the sugar mixture over the melted butter. Arrange the apple halves flat side down in the pan. Sprinkle the remaining sugar over the apples. Cook until the caramel syrup turns a deep golden brown color, about 15 minutes. Carefully arrange the chilled pie crust over the top of the cooked apples and use a spatula to tuck in the edges.
Put the skillet in the oven and bake until the crust is cooked and is slightly brown in color, about 15 to 20 minutes. Remove the skillet from the oven and let it stand for around 5 minutes, then invert the pie onto a serving platter.
In a medium bowl, using a hand mixer on medium speed, whip the heavy cream with the confectioners' sugar and the remaining 1/2 teaspoon of pumpkin pie spice until soft peaks form. Serve the warm tart on individual plates with a dollop of whipped cream.