Combine all dry ingredients (flour, oats, sugar, baking powder, salt, baking soda, cinnamon, and nutmeg).
In a blender, combine all wet ingredients (peaches, eggs, oil, yogurt, and vanilla). Blend until smooth. If you want to leave some peaches diced, don't add them to your blender. Add them in the next step.
Fold into dry ingredients and mix just until dry ingredients are moistened. Pour into a prepared bread loaf pan.
Bake at 350 degrees for 45-60 minutes, or until center is cooked through.