6 Granny Smith apples, peeled, cored, chopped (about 3 1/2 pounds)
1/4 cup all-purpose flour
1/2 cup brown sugar
1 tablespoon lemon juice
1/4 cup maple syrup
1 cup all-purpose flour
3/4 cup brown sugar
1/4 teaspoon ground cinnamon
1/4 teaspoon salt
8 tablespoons (1 stick) chilled butter, cut into pieces
1/4 cup coarsely chopped pecans
1 cup heavy cream
1/4 cup confectioners' sugar
1 tablespoon bourbon