01 - Preheat oven to 350°F. Grease a 9x9-inch baking dish.
02 - In a large bowl, blend rolled oats, nuts, baking powder, cinnamon, nutmeg, and salt.
03 - In a separate bowl, whisk together milk, eggs, melted butter, maple syrup, and vanilla extract.
04 - Pour wet ingredients into the dry mixture and stir to fully incorporate. Gently fold in diced apples and dried fruit.
05 - Transfer the oatmeal mixture to the prepared baking dish, spreading evenly.
06 - Bake for 35 minutes until golden brown and set.
07 - Allow to cool for 5 minutes before serving. Top with additional milk or yogurt if desired.