Preheat oven to 400 degrees Fahrenheit.

Grease a 12-cup muffin pan with butter or oil.

In a large bowl, combine flour, baking soda, salt, lemon zest, and cinnamon.

In a separate bowl, whisk together olive oil, eggs, and sugar.

Pour the wet ingredients into the dry ingredients and stir until just combined.

Gently fold in the diced peaches.

Spoon the batter into the prepared muffin cups, filling each about 3/4 full.

Bake for 20-25 minutes, or until a wooden skewer inserted into the center comes out clean.

Let the muffins cool in the pan for 10 minutes before transferring them to a wire rack to cool completely or until slightly warm.

Enjoy while warm or at room temperature.