This pie is a two part pie. Make the crust first then the filling.
Slice plums in half and remove pit. Arrange the plums cut side down over crust. Spread th filling on top and smooth wit a small offset spatula. Sprinkle with the remaining alonds and place in the freezer for 30 minutes.
Preheat oven to 350 degrees F. Bake pie until the filling puffs and is golden but still slightly soft in the center, 1 hour 15 minutes for a glass bottomed pan, or 1 hour 30 minutes for an aluminum pan. If the crust begins to overbrown, cover the pie with foil during the last 15 minutes of cooking. When pie is done, turn off the oven and prop door open. Cool pie in the oven for 15 minutes, then transfer to a rack to cool completey. Serve at room temperature.