Instructions: 1. Preheat the Oven: Preheat your oven to 375°F (190°C).
2. Prepare the Crust: Roll out one pie crust and place it into a 9-inch pie dish. Trim any excess dough from the edges.
3. Prepare the Filling: In a large bowl, combine the sliced apples, sliced pears, granulated sugar, brown sugar, flour, cinnamon, nutmeg, salt, and lemon juice.
4. Make the Streusel Topping: In a separate bowl, combine the flour and brown sugar.Cut in the cold butter using a pastry cutter or fork until the mixture resembles coarse crumbs.
5. Bake: Place the pie on a baking sheet to catch any drips, and bake in the preheated oven for 50 to 60 minutes, or until the streusel is golden brown and the filling is bubbly.
6. Cool and Serve: Allow the pie to cool on a wire rack for at least 1 hour before serving to allow the filling to set. Serve slices of apple pear pie warm or at room temperature, optionally topped with whipped cream or vanilla ice cream.