Blend the oats in a mixer jar for 30-60 seconds or until oats have become a fine powder and look like flour.
Take this flour in a bowl, Add baking powder, baking soda, salt, sugar and cinnamon to it and stir to combine. Set aside.
Add milk, yogurt, apple sauce and spinach in a mixer jar.Blend starting on low speed and increasing to high.Blend until mixture is smooth and homogeneous.
Add vanilla extract and egg and pulse until just combined. Pour wet ingredients into dry ingredients and mix until just combined.
Grease the griddle with oil. Carefully add 1 full ladle of pancake batter onto the griddle about 1-2” apart.
Cook on the first side until the edges become firm and the batter begins to bubble slightly (2-3 minutes). Flip and cook on the second side until golden brown (about 1-3 more minutes).
Repeat until all the batter has been used! Serve warm with maple syrup!