Baking Challenge Week 27 (Late!) - Tarts - Blueberry Galette

My parents are having us over to dinner this week--they're providing the steaks and the beer, and I'm responsible for the potato salad.  Because I needed to cross the W27 challenge off my list, I'm bringing a dessert too!

I even managed to take pictures during the process so I could do a pictorial recipe.  Haven't seen one of those here in a while, have you?  (/pats self on back)

Blueberry Galette

• 1 pie crust (use your favorite recipe or buy one!)
• 6 lemon creme sandwich cookies
• 1 pint blueberries
• 1/4 cup sugar
• 1 tbsp cornstarch
• 1 egg

 First thing's first--wash your blueberries and allow them to dry on paper towels while getting everything else ready.  Not pictured:  Preheat your oven to 375 F; line a baking sheet with foil or parchment paper; roll out your pie crust to at least 11" in diameter.

These are the cookies I opted to use.  Doing my research for this challenge, some (but certainly not all) galette recipes use frangipane or crushed cookies on the bottom to absorb the juices of the fruit.  Because blueberries are gooey in the extreme, I thought this was a good plan, and I had these around.  Vanilla creme would be good too, I'd expect.

Take your six cookies and chop them roughly...

...then scatter them on your pie crust that you'd already laid out on your baking sheet even though I didn't specifically tell you to!  It's hard to see in the photo, but I lightly pressed the rim of my 9" pie tin into the dough as a guide--strictly optional for a neater tart.

Combine the blueberries, sugar, and cornstarch in a small bowl and toss to coat the berries.

Spread that over the cookie bits.  You can see there's a bit of loose sugar, and that's okay, the juices from the blueberries as they cook down will take care of it nicely.

Fold up the edges to cover the filling.  You can be as neat-and-fancy or as rough-and-rustic as you like here.  I went super-basic.

Beat the egg in a small bowl and brush over the top of the crust.  Bake 30-40 minutes, until the filling is nice and juicy, and the crust is golden brown.

I'm so pleased that I only had one tiny leak!