01 - Preheat oven to 350°F. Lightly grease a 9x9-inch baking dish.
02 - In a large mixing bowl, whisk together rolled oats, chopped nuts, baking powder, ground cinnamon, ground nutmeg, and salt until evenly blended.
03 - In a separate bowl, whisk milk, eggs, melted butter, maple syrup, and vanilla extract until thoroughly combined.
04 - Add wet mixture to the dry ingredients and stir until unified. Gently fold in diced apples and dried fruit.
05 - Transfer batter to the prepared baking dish, spreading it evenly. Bake for 35 minutes, or until golden and set.
06 - Allow bake to cool for 5 minutes before slicing. Serve warm with additional milk or yogurt if desired.