From the kitchen of Stephanie Knewasser

In a food processor, blade attachment:

3/4 c COLD butter, sliced*

1/2 c sugar

1 1/2 c flour

pinch salt

Pulse just until crumbly. 

Reserve 1 cup of crumbs for topping.

Grease bottom of a 13×9 glass baking dish with Crisco.

Add remaining crumbs to baking dish.

Firmly pat flat.

Bake @ 350, 10 minutes.

Evenly layer 3 c blueberries over crust.

In a bowl, whisk:

2 eggs

Add:

1 c sugar

1/3 c flour

1/2 c sour cream

1 tsp vanilla

pinch salt

Evenly pour over blueberries.

Add: 1 tsp nutmeg to the reserved crumbs; sprinkle over the top.

Bake @ 350, 50 minutes.

*Butter must be cold to get the crumbly texture; use it straight from the refrigerator. Slicing the butter helps it combine quicker preventing overmixing.