Preheat oven to 400 degrees F. Coat a 2-1/2-quart baking dish with cooking spray. In a large bowl combine sugar, cornstarch, salt and almond extract. Cut in butter until crumbly, gently stir in plums. Place mixture into prepared baking dish. Cut pie crust into 7 (1/2-inch) strips. Place strips over plum mixture in a lattice pattern. Bake 40 to 45 minutes or until golden brown.