Begin by getting out your food processor or blender.
Add the oats, oat milk, banana, baking powder, lemon juice, honey, and vanilla to the machine.
Blend on high until everything is smooth and homogenous.
Pour the batter into a large pourable measuring cup. Fold in the blueberries.
In a nonstick skillet, melt the butter over medium heat. Pour some pancake batter into the pan in your desired size and shape.
Cook for 2-3 minutes before flipping the pancakes. The tops should have lots of bubbles when they are ready to turn.
Continue cooking on the second side for 1-2 minutes.
Remove the pancakes to a plate and enjoy with butter, syrup, and additional blueberries or bananas.