In a medium bowl, make the buttermilk by stirring the lemon juice into the milk. Set aside.

In a large bowl, whisk together the flour, oats, brown sugar, baking powder, baking soda, salt, and cinnamon.

In the bowl with the buttermilk, add in the olive oil, eggs, and vanilla extract. Whisk until combined.

Pour wet ingredients over dry ingredients and stir until combined.

Let pancake mixture sit for at least 20 minutes. You can cover and put the mixture in the refrigerator for 3-4 hours before making the pancakes.

When ready to cook, heat a griddle or pan to medium low heat. Coat with cooking spray.

Drop about a 1/4 cup of batter onto heated skillet. Cook until surface of pancakes have some bubbles and a few have burst, 1 to 2 minutes. Flip carefully with a spatula, and cook until browned on the underside, 1 to 2 minutes more. Continue making pancakes until the batter is gone.

Serve pancakes with fruit and maple syrup, if desired.