blueberry galette

I started out with the intention of making this rhubarb galette recipe. But alas, I couldn't find rhubarb in any of my local markets that day, so picked up blueberries instead. I followed the basic structure of Elise's recipe, but with the following substitutions/tweaks:
-rhubarb —> blueberries (3 small containers)
-orange zest —> lemon zest
-reduced sugar to about 1/2 cup (blueberries don't need as much added sweetness), and omitted the vanilla
-Also, before baking, I brushed the top of the crust with egg wash (1 egg whisked with a little water), and sprinkled sugar over it... because I'm a sucker for a sparkly, sugary pie crust.