Break crackers into fine crumbs. Measure crumbs, should be approx. 1-1/4 cup. Place crumbs and prune butter in processor and process until moist. Coat a 9-inch pie pan with non-stick cooking spray. Use back of spoon to press the crumbs against the sides and bottom of pan. Periodically dip spoon in sugar to prevent sticking. Bake the pie shell at 350 degrees for 10 minutes. Let cool.
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