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Preheat the oven to 350°F. Rub a generous amount of soft butter on the inside of a 9" pie pan at least 1 1/2" deep; use a deep dish pan, if you have one. If your pie pan isn't at least 1 1/2" deep, substitute a 9" square pan.
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To make the crust: Place the graham crackers, sugar, almonds, and salt in a food processor or blender, and process until totally ground, but not powdery.
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Pour the crumbs into the pan, tilting and shaking the pan to distribute the crumbs across the bottom and up the sides of the pan. Place the pan on a baking sheet, to make it easy to handle once you've added the filling.
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To make the filling: Mix together all the filling ingredients, and beat slowly until well combined. For smoother texture, gently pulse the filling in a food processor a few times.
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Pour the filling into the crust; it will come nearly to the lip of the pan.
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Bake the pie for 45 to 50 minutes, until it's becoming brown around the very outside edge, and an instant-read thermometer inserted into the center registers 160°F. The pie will still look quite unset in the center; that's OK.
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Remove the pie from the oven, and cool it to room temperature. Once it's cool, refrigerate until chilled.
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Serve pie as is, or with the topping of your choice.