Butter for coating dish

FILLING:
6 cups peaches, halved, pitted, and sliced 1/4 inch thick
3/4 cup sugar
1/4 cup quick-cooking tapioca
1 teaspoon ground cinnamon
1 teaspoon freshly squeezed lemon juice
Pinch salt

TOPPING:
1 2/3 cups all-purpose ß our, plus additional
for dusting
3 1/2 tablespoons sugar
1 1/2 tablespoons baking powder
1/8 teaspoon salt
6 tablespoons cold unsalted butter, cut into cubes
2/3 cup heavy cream, plus additional for brushing