Preheat oven to 375.
Grease bottom of a 8×8 baking dish with 1 TBSP of fat of choice. Place one layer of sliced bananas on the bottom of the dish.
Mix together dry ingredients – oats, optional coconut flakes, cinnamon, nutmeg, salt and baking soda. Once mixed well, pour into baking dish on top of the banana.
Mix wet ingredients together – milk, water, maple syrup, melted fat, and vanilla extract. Pour the liquid mixture on top of the dry.
Place a layer of sliced banana on top of the oatmeal/liquid mixture.
Put oatmeal in preheated over and and bake for 35-40 minutes.