For the Filling:

2 1/2 lbs Gala apples, peeled, cored and sliced 1/4" thick*
1/2 cup agave (or sugar)
2 tbsp cornstarch
1/2 tsp cinnamon
1/4 tsp nutmeg
pinch of sea salt
2 tbsp fresh lemon juice
1/2 cup water

For the Topping:

1/4 cup King Arthur white whole wheat flour
1/4 cup King Arthur all purpose flour
2 tbsp granulated sugar
1/2 tsp baking powder
1/4 tsp baking soda
2 tbsp chilled light butter, cut into small pieces (I used Land O Lakes)
1/3 cup low-fat buttermilk
1 tbsp canola oil
1 tsp light brown sugar (unpacked)