I absolutely love the trick in the blueberry pie recipe to coat baked shells
with eggwhite + a bit of sugar. It gives a lovely glossy shine and really crisps up the crusts. And it doesn't seem to get soggy even after you put in the filling.
I think it would even work with savory fillings because it isn't that much sugar.
I'll find the recipe.
9 Inch Baked Pastry Shell
Egg Wash
1 Egg White
1/8 Cup Sugar
2 Tablespoons Water
PIE CRUST
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Use a Pillsbury "unfolded" type shell, you only need half the package. Let it sit till it's at room temp. Then, fit it to your pie pan, and pinch the crust around the edges of the pie pan. Then, take your fork and prick it all over, sides and bottom. Go ahead and bake it for the 10 or 12 minutes till it starts to get a little brown. Take it out of the oven and now brush it all with a pastry brush with the Eggwash ( egg white/sugar and water whipped up a bit), and put it back in the oven to set, and then do it again. This makes the crust VERY crisp/tender and the sugar/egg wash makes the crust golden, glossy and sweet.
Let the crust rest, and get cool. It doesn't take long, so you go on ahead and fix the filling at this point.