Prepare Topping: In a saucepan, whisk sugar, cornstarch, and salt. Add water, berries, and butter. Bring to boil, simmer 2 minutes, chill.
Prepare Crust: Preheat oven to 400°F. Mix flour, sugar, and nuts. Mash in butter. Bake 5 minutes, stir, bake 5 more. Press into pie plate, cool.
Prepare Filling: Beat cream cheese, sugar, vanilla, lemon juice until smooth. Add cream, beat fluffy.
Assemble: Spoon filling into crust, top with chilled berry mixture, garnish.
