Preheat the oven to 350 degrees F. Grease a large muffin pan (I use baking spray with flour).
In a large bowl, whisk together the flour, sugar, salt, baking powder, baking soda and cinnamon. In a separate bowl, vigorously whisk together the eggs, greek yogurt, coconut oil and milk.
Immediately pour the wet ingredients into the dry ingredients along with the chopped peaches and mix together with a spatula until just combined. Do not overmix.
Scoop the batter into the prepared muffin pan. Bake for 20-23 minutes. Allow to cool in pan for 5 minutes and then gently move to a cooling rack.