¼ teaspoon ground cinnamon, plus extra for garnish
Preheat oven to 400°. Butter a rimmed baking sheet. Roll out pie crust on a floured surface to approx. 16″ square. Spread preserves over pastry, leaving 1″ border on all sides. Sprinkle dried fruit and nuts evenly over preserves. Sprinkle with cinnamon. Fold about 1″ of each pastry side over filling. Starting at bottom, roll up pastry jelly-roll style, enclosing filling. Transfer strudel to prepared baking sheet, seam side down. Sprinkle with additional cinnamon.
Bake strudel until golden brown, about 35 minutes. Cool completely. Cut strudel into 1″ slices.