- Preheat your oven to 350°F and grease a loaf pan. 
- In a large bowl, mix flour, baking soda, and salt. 
- In a separate bowl, whisk together the oil and sugar until smooth. 
- Add the eggs, sour cream, vanilla, and cinnamon to the sugar mixture and stir until fully combined. 
- Fold in the dry ingredients until just mixed—don’t overdo it. 
- Gently stir in the diced peaches and pecans, if using. 
- Pour the batter into the prepared loaf pan. 
- Bake for 55–60 minutes or until a toothpick comes out clean from the center. 
- Let it cool in the pan for 10 minutes, then transfer to a wire rack to cool completely before slicing.