"Serving with ice cream is not optional...."
all-purpose flour, plus more for surface
(2 sticks) butter, cut into ½" pieces
granulated sugar
kosher salt
apple cider vinegar
ice water (or more, if needed)
assorted apples (Granny Smith, Honeycrisp, Gala) cored, peeled, and thinly sliced (about 7 apples)
packed dark brown sugar
freshly-squeezed lemon juice
cornstarch
cinnamon
vanilla extract
kosher salt
caramel, plus more for serving
egg beaten with 1 tbsp. water (egg wash)
Coarse sugar, for sprinkling
Ice cream, for serving