Preheat the oven to 375 degrees. Toss all the filling ingredients together and set aside.
For the streusel, mix the almond flour, all-purpose flour, light brown sugar, and salt together. Rub the butter in until the mixture resembles cornmeal. Combine with the granola.
Place the filling into a pie pan and top with streusel. Bake until golden brown, about 40 minutes. Let cool slightly, then serve with whipped cream, yogurt, or ice cream.
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