For the Crust:
Canola oil cooking spray
18 ounces chocolate wafers (2 packages), finely ground (4 1/2 cups)
1/4 cup plus 2 tablespoons sugar
5 ounces (1 1/2 sticks) unsalted butter, melted
1 teaspoon coarse salt

For the ganache:
4 ounces semi/bitter-sweet chocolate (preferably 61%), finely chopped
1/2 up heavy cream

For the Filling:
32 ounces cream cheese, softened
1 1/2 ups sugar
1/4 teaspoon coarse salt
3 tablespoons fresh lemon juice
1 1/2 cups heavy cream, cold