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To make the pecan crumble: In a bowl, mix together flour, pecans, brown sugar, cinnamon, and 1/2 teaspoon salt. Cut in butter using a pastry cutter or rub in with your fingers until small to medium clumps form.", "Divide the whole mixture in half and evenly spread one half in the bottom of the baking dish. Leave the second half in the bowl. Refrigerate both halves until ready to use.", "In the bottom of a large bowl whisk Maple syrup, ginger and lemon juice until well combined. Add the sliced apples, pears and 1 tablespoon cornstarch; using a large spatula or your hands, carefully mix to completely coat the fruit with the maple, ginger and lemon mixture.", "Get both halves of the pecan crumble; the baking dish and the bowl with the pecan crumble out of refrigerator. Place the baking dish on a reamed baking sheet lined with foil.", "Evenly spread the apple-pear filling on top of the crumble and then cover with remaining half of the pecan crumble. Transfer to the middle rack of the oven and bake for about 1 hour or until the middle is bubbling and the top is golden brown. If you see that the top browns too fast, tent it with foil.", "Using an electric mixer on high speed, whip heavy cream and sour cream in a large bowl until soft peaks form, about 2 minutes. Keep on whipping, and add maple syrup in a steady stream; then cinnamon and vanilla; continue to whip until maple cream is thick and velvety, about 1 minute more. Freeze until ready to serve.", "Serve the pie warm or at room temperature with a dollop of whipped cream.
