Heat oven to 400°F. In 12x8-inch (2-quart) glass baking dish, combine pie filling, raspberries and cinnamon. Bake at 400°F. for 20 minutes or until fruit is hot.
Remove baking dish from oven. Separate dough into 10 biscuits. Arrange biscuits over hot fruit. Brush with margarine; sprinkle with sugar and walnuts.
Return to oven; bake an additional 15 to 20 minutes or until biscuits are deep golden brown.