Step 1

In a large bowl, toss frozen blueberries, lemon juice and zest, 1 tbsp. sugar, cornstarch, pinch of salt, and vanilla until blueberries are fully and evenly covered.

Step 2

Sift flour, 1/4 cup sugar, and baking powder in a separate bowl.

Step 3

Dice up 1 tbsp. cold, salted butter into small, pea-sized pieces.

Step 4

Add greek yogurt, splash of vanilla, butter, and milk to flour mixture. Stir flour mixture until dough is shaggy and all loose flour and sugar are incorporated.

Step 5

Spray a pie dish with cooking spray and add the blueberry mixture.

Step 6

Add dollops of the topping to the top of the blueberries until most of the baking dish is covered.

Step 7

Mix egg and a splash of water and brush the topping with egg wash.

Step 8

Bake for 30-40 minutes at 375 or until golden brown.  Let cool for at least 30 minutes before serving.