To make filled pancakes, prepare batter as above, sans apples. Use an eighth-cup measuring cup and pour batter onto hot frying pan. When beginning to bubble, carefully place a spoonful of grated apples in the center of each pancake. You can add a bit more cinnamon and sugar, too, if desired. Quickly cover with another eighth-cup batter and carefully flip over to continue cooking on other side. You can gently press down with a spatula to ensure even cooking.
This will yield 8 filled pancakes. You can also fill with a few fresh blueberries, a dollop of jam, or some grated dark chocolate
Pancakes can be fried in a bit of oil. However, if you use a nonstick frying pan, spraying once with cooking spray is sufficient.
To make these even more nutritious, replace another tablespoon of flour with ground flaxseed or oat bran. Pancakes get brown from cooking anyway, and nobody will know.