Heat a non-stick skillet over medium heat. Coat skillet use cooking spray, or by lightly brushing with vegetable oil. Use ¼ cups of batter for each pancake, press several slices of banana into pancake, and then cover with a little additional batter. Cook until bubbles form (~3min), then flip and finish cooking.
In a medium bowl, whisk together whole milk and lemon juice together, and allow to sit and thicken for 10min.
In a small bowl, whisk eggs, vegetable oil and vanilla extract. Whisk egg mixture into thickened milk mixture.
Process half of muesli (¾ cups) until coarsely ground.
In a large bowl, whisk together processed and regular muesli, flour, whole-wheat flour, brown sugar, baking soda, baking powder, salt, cinnamon, and nutmeg. Gently whisk the wet ingredients into the dry ingredients until just combined.
LET BATTER REST 5min BEFORE COOKING.
Serve pancakes with syrup, powdered sugar, lemon curd, pumpkin butter or jam.