1 ½cuppeeledchopped apple (from 1 large or 2 medium)
Thinly sliced appleplus a dusting of cinnamon for topping (optional)
Preheat oven to 400 degrees F. Prepare a 12-cup muffin tin by lining with paper liners or greasing well.
In a large bowl, whisk together flour, sugar, baking powder, baking soda, cinnamon, nutmeg and salt. In a separate bowl, whisk together oil, egg and buttermilk. Add to dry ingredients and gently incorporate using a rubber spatula until about 80% combined. Fold in chopped apple to finish combining. (You don't ever want to over-stir muffins or they'll be tough).
Divide batter among muffin cups and top with apple slices and a dusting of cinnamon, if desired. Bake for 20-22 minutes, until golden brown and tops spring back when lightly touched. Transfer to wire racks to cool.