Preheat oven to 325°F. Line 13x9-inch baking pan with foil, with ends of foil extending over sides of pan. Mix cracker crumbs, 3 Tbsp. sugar and the margarine; press firmly onto bottom of prepared pan. Bake 10 min.

Beat Neufchatel cheesee, 1 cup sugar, the flour and vanilla in large bowl with electric mixer on medium speed until well blended. Add sour cream; mix well. Add eggs, one at a time, mixing on low speed after each addition just until blended. Pour over crust. Gently drop small spoonfuls of jam over batter; cut through batter several times with knife for marble effect.

Bake 40 min. or until center is almost set. Cool completely. Refrigerate at least 4 hours or overnight. Lift cheesecake from pan using foil handles. Cut into 16 pieces to serve. Store leftover cheesecake in refrigerator.