Preheat your oven to 350°F (175°C).
In a large mixing bowl, combine rolled oats, baking powder, cinnamon, and salt.
In another bowl, whisk together milk, maple syrup, and vanilla extract.
Pour the wet ingredients into the dry ingredients and mix until well combined.
Fold in the sliced bananas, nuts, and dried fruits.
Grease a baking dish with cooking spray or butter.
Pour the oatmeal mixture into the prepared baking dish.
Spread the mixture evenly and press it down gently.
Bake in the preheated oven for 30-35 minutes or until the top is golden brown.
Allow to cool slightly before serving. Enjoy warm!