Prepare the crust as directed on the package and let cool. Beat the whipping cream until soft peaks form. Beat in the vanilla and the sugar. Fold in the pineapple. Set aside. In a second bowl, beat the butter and 2 cups confectioners’ sugar until creamy. Beat in the vanilla, egg and salt.
Spread the butter mixture over bottom of the shell, then spread the pineapple mixture over the butter mixture.
Sprinkle top with toasted pecans. Chill overnight.