3/4 cup whole wheat pastry flour (see note)
3/4 cup firmly packed light brown sugar
5 teaspoons ground cinnamon
  pinch salt
1/3 cup canola oil
2 cups coarsely chopped walnuts
  butter (for greasing the baking pan)
2 cups whole wheat pastry flour
3/4 cup firmly packed brown sugar
3/4 cup granulated sugar
1/2 teaspoon ground cinnamon
1/2 teaspoon salt
1/2 teaspoon ground ginger
1 teaspoon baking powder
1 teaspoon baking soda
1 large egg
1 cup buttermilk
1/2 cup canola oil
1/2 teaspoon pure vanilla extract