Ingredients
2 tbsp lemon juice
1-1/2 tsp vanilla extract
3 granny smith apples
3 macintosh apples
2 cups fresh or frozen blackberries
2/3 cup sugar
1/4 cup instant tapioca
zest of one lemon
1/2 tsp salt
2 pie crusts

Instructions
Preheat oven to 350 degrees.

Combine the lemon juice and vanilla in a large bowl.  Peel and slice the apples in 3/4 inch chunks and toss them in the bowl with the liquids as you go.

Add the blackberries, sugar, tapioca, lemon zest, and salt to the apples.

Line a deep dish 9″ pie pan with one of the pie crusts.  Fill with the apple-blackberry mixture and cover with the other pie crust.  Trim the edges and pinch them together firmly.  Cut holes in the top pie crust to let the steam out.  Bake in the oven for 50 minutes and voila!