1Preheat the oven to 350F and spray a 9"x5" loaf pan with nonstick spray. In a large bowl, stir together the dry ingredients. Cut in the butter until the mixture is evenly crumbly. (Idea: you could do this in the food processor, and make dry mixes in advance to keep in the freezer; add the egg, juice and berries when you want to bake it!)
2Add the egg, zest and juice and stir until almost combined; add the cranberries and raisins and stir just until the batter comes together.
3 Spread into the pan and bake for about an hour, until the top is springy to the touch.