Grease or line with parchment a 9x13 baking dish- set aside.
Preheat oven to 350 degrees.
Add flour, sugar, salt & cubed butter to mixing bowl, beat until combined & crumbly.
Take 1 cup of mixture & set aside.
Take remaining mixture & firmly press into your baking dish, covering the bottom. Bake 15 minutes.
While crust is baking- whisk the eggs in a large bowl.
Add sugar, sour cream, flour & salt. Whisk well.
Gently fold in blueberries. Set aside.
When the crust is ready - remove from oven & add filling by gently spooning it over the top of the partially baked crust.
Sprinkle with remaining crust mixture you had set aside.
Bake 1 hour or until top is lightly browned.
Cool before serving if eating without a topping.
If serving warm- add a scoop of vanilla ice cream on top :)