Whisk the oats, baking powder, salt and cinnamon together in a skillet. Add the butter, vanilla, maple syrup, bourbon, egg, milk, half and half, mashed bananas and pecans. Stir together until combined.
Bake for 35 to 45 minutes, or until the oatmeal is set and the top is golden. Let it sit for a few minutes to set. Serve with banana slices, pecans, cinnamon and cream!