Grease a 9x13 glass baking dish- set aside.
Preheat the oven to 350 degrees.
Prepare the crust/topping by adding the flour, sugar, butter and salt to a mixing bowl, beat until combined & crumbly.
Take 1 cup of the mixture & set aside. Take the remaining mixture & firmly press into an even layer in the bottom of the baking dish. Bake for 15 minutes.
While crust is baking- whisk the eggs in a large bowl.
Add the sugar, sour cream, flour & salt. Mix
Gently fold in berries & then set the mixture aside.
When the crust is ready - remove from oven & gently spoon in the filling over the top of the crust.
Sprinkle the remaining crust mixture that was set aside over the top - no need for it all to cover or be spread out. Just leave it as crumbles.
Bake for 45 minutes -1 hour or until the top is lightly browned.
If the bottom is getting too brown you can remove & broil the top for a couple minutes to brown it up.
Cool on a wire rack before adding the white chocolate.
Once cooled- melt your white chocolate melting chocolates in a microwave-safe bowl in the microwave in 30-second intervals until melted. Then drizzle over the top of the bars before cutting them.