Peel the banana and cut into chunks.
In a medium bowl, mix together the milk, egg, vanilla, banana, chia seeds, and agave; mash the banana while mixing. Set aside.
In a separate bowl, mix together the flour, baking powder, and cinnamon.
Add wet ingredients to the dry ingredients and mix just until combined; batter may be lumpy.
Spray a large skillet with cooking spray and heat over medium-high.
Pour batter onto the hot skillet, making 2-3 inch round pancakes. Cook approximately 2 minutes per side until both sides are browned. Repeat until all batter has been used.
Top pancakes with maple syrup and chopped walnuts. Serve apples on the side.