Pre-heat oven to 400F.
Lightly grease 12 standard muffin-cups.
In a large bowl mix oats, flour, baking powder, baking soda, sea salt and ground cinnamon.
In medium bowl, beat buttermilk, olive oil, and egg with hand blender, until frothy. Stir in shredded apples.
Add small bowl contents into large bowl with flour and oat mixture, blending until mixture is just moistened; then add chopped walnuts.
Spoon batter into prepared muffin tins.
Bake 23-25 minutes or until muffins begin to brown; check the center with a toothpick. If it comes out clean, muffins are done.
Remove muffins from pan onto wire rack to cool for serving later.
Otherwise serve the muffins warm with a pat of butter (remember portions) and a coffee of your favorite choice or herbal tea.
Yield 12 muffins-Yummy!