In a small bowl, mix together the buttermilk and oats, let sit for about 5-10 minutes until oatmeal is softened.
After the oats are soft, add the eggs and oil, and whisk together.
In a large bowl mix together flour, sugar, cinnamon, nutmeg and salt.
Add wet ingredients to dry ingredients in large bowl. Mixwet and dry ingredients together just until ingredients are incorporated, batter should be lumpy.
Fold in lemon zest and blueberries.
Heat griddle or pan to 350 degrees. Grease pan with butter or oil spray. Using a 1/4 cup measuring cup, scoop batter onto heated and greased griddle. Let cook until bubbles start to appear, then flip pancakes ONE TIMLet the pancake cook until pancake springs back when lightly poked in the middle. Do not pat the pancake down. Do not flip pancake more than once.
Sprinkle with powdered sugar and serve with pure maple syrup and additional fresh or frozen berries on the side.