1Spray a baking sheet with cooking spray; set aside. When ready to prepare cookies- preheat oven to 350^.
Beat margarine, cream cheese, vanilla and sugar in a bowl until fluffy.
Mix in flour and salt until a soft dough is formed. Cover and refrigerate 2-3 hours. Then on lightly floured surface roll dough to 1/8-inch thickness; with a cookie cutter cut into 3-inch rounds. Place 1/4 teaspoon of preserves(here you may add any of your favorite sugar-free jams, or preserves) in the center; fold in half and crimp edges.
With a sharp knife pierce top of each cookie for steam release.
Bake cookies until lightly browned, about 8-10 minutes. Cool on wire rack.