01 - Preheat oven to 350°F. Grease a 9x9-inch baking dish with butter or oil.
02 - In a large mixing bowl, combine rolled oats, chopped nuts, baking powder, ground cinnamon, ground nutmeg, and salt. Mix thoroughly.
03 - In a separate bowl, whisk together milk, eggs, melted butter, maple syrup, and vanilla extract until fully blended.
04 - Pour wet ingredients into the dry mixture and stir until combined. Gently fold in diced apples and dried fruit, ensuring even distribution.
05 - Pour the batter into the prepared baking dish and spread evenly with a spatula.
06 - Bake for 35 minutes or until golden brown and set at the center.
07 - Allow to cool for 5 minutes before slicing and serving warm. Accompany with extra milk or yogurt if desired.