Preheat oven to 375 degrees F.
Mix topping ingredients together, stirring in the melted butter last, and set aside.
Cook all the filling ingredients EXCEPT the berries on medium heat, whisking frequently, until it is well blended and thick.
Remove filling from heat and stir in berries.
Spoon filling into pie crust.
Crumble topping over filling, completely covering the berries.
Place pie on a cookie sheet (helps cook the bottom) and bake in oven for 45 minutes.
Cool and serve!
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