Preheat the oven to 350℉. Spray a 9x5-inch loaf pan with nonstick spray.
PREPARE THE CINNAMON-PECAN MIXTURE:
In a small bowl, stir together the cinnamon-pecan ingredients. Set aside.
PREPARE THE BREAD BATTER:
In a large bowl, stir together the flour, sugar, baking powder and salt. In a medium bowl, beat the egg with a fork, and then stir in the milk and oil. Add the egg mixture to the flour mixture. Stir just until moistened (it will be lumpy).
Spoon half of the batter into the prepared pan. Sprinkle with half of the cinnamon-pecan mixture. Pour the rest of the batter on top. And then sprinkle the rest of the cinnamon-pecan mixture on the very top. Use a butter knife to cut down through the batter and pull up and around to create a swirled, marbled effect.
Bake for 55 to 60 minutes (or until a wooden pick inserted into the center comes out clean). Cool in a pan on a wire rack for 10 minutes. Remove the bread from the pan, and let it cool completely on a wire rack. Wrap and store overnight before slicing.