1. Preheat oven to 350°F (177°C).
2. Line a 9x5 loaf pan with parchment paper. 
3. In a large bowl, toss the flour, baking soda, salt, cranberries, together until combined. Set aside. In a medium bowl, whisk the egg, and sugar together until combined. Use a hand blender for the purpose.
4. Whisk in the buttermilk, oil, vanilla, and orange zest. 
5. Slowly pour the wet ingredients into the dry ingredients and gently combine until there are no more lumps. Do not over mix the batter.
6. Pour the batter into the prepared loaf pan. 
7. Bake the bread for 45 minutes to 1 hour, covering loosely with foil about halfway through to ensure even browning.
8. Poke the center of the bread with a toothpick. If it comes out clean, the bread is done. 
9. Allow bread to cool completely in the pan on a wire rack. Slice and serve.

Enjoy your meal!