To prepare a French apple pie with streusel topping, you will first need to prepare the filling. Preheat the oven to 325 degrees F (180 degrees C) and grease and flour two 9-inch pie pans. Cut the apples in half lengthwise and scoop out the seeds. Place the apple halves in the bottom of the greased pan and sprinkle with the sugar. Bake the pie for about 45 minutes or until the crust is golden brown. Remove from oven and allow to cool before serving.