Salted Caramel Apple Crumb Bars

INGREDIENTS

For the Apple Filling:

5 cups

peeled and diced apples (I used Granny Smith)

1 tbsp

fresh lemon juice

1/2 cup

all-purpose flour

1 tsp

cornstarch

1 cup

granulated sugar

1/4 tsp

salt

1 tsp

ground cinnamon

1/4 tsp

ground nutmeg

1/4 tsp

ground all-spice

For the crust:

3 cups

all-purpose flour

1 cup

granulated sugar

1 tsp

baking powder

1/4 tsp

salt

1/4 tsp

cinnamon

1 cup

cold unsalted butter, cut into small pieces

egg, lightly beaten

1/2 tsp

vanilla extract

Salted Caramel Sauce (can use store bought)