Preheat oven to 350°F.
CRUST: Mix oats, flour, corn syrup, brown sugar and butter in a large bowl at low speed of electric mixer until crumbly. Press about 3/4 of mixture into the bottom of a greased 8 x 8-inch or 11 x 7-inch baking pan. Reserve remaining crumb mixture for topping.
FILLING: Mix cream cheese, sugar and egg until smooth. Pour over crust. Microwave blackberry spread in microwave-safe container on HIGH (100%) for 10 seconds. Drop spoonfuls of melted fruit spread over cream cheese mixture. Use a knife to swirl jelly through cream cheese. Top with reserved crumb mixture.
Bake 25 minutes or until center is set. Cool on wire rack and cut into bars.