Preheat your oven to 350°F (175°C) and grease a 9x5-inch loaf pan.

In a large mixing bowl, whisk together the all-purpose flour, baking powder, baking soda, salt, ground cinnamon, and nutmeg until well combined.

In another bowl, beat the eggs and granulated sugar together until frothy, then add vegetable oil, milk, and vanilla extract, mixing until smooth.

Gently fold the dry ingredients into the wet mixture, then add the diced peaches and mix until just combined.

Pour the batter into the greased loaf pan, smoothing the top, and sprinkle with cinnamon streusel if desired.

Bake for 50-55 minutes or until a toothpick comes out clean.

Allow the bread to cool in the pan for 10 minutes, then transfer to a wire rack.