01 - Preheat oven to 350°F. Lightly grease a 9x9-inch baking dish to prevent sticking.
02 - In a large mixing bowl, blend rolled oats, chopped nuts, baking powder, ground cinnamon, ground nutmeg, and salt until evenly incorporated.
03 - In a separate bowl, whisk together milk, eggs, melted butter, maple syrup, and vanilla extract until smooth.
04 - Pour wet ingredients into the dry mixture. Stir until fully combined. Gently fold in diced apples and dried fruit.
05 - Pour batter into the prepared baking dish, spreading evenly throughout.
06 - Bake on the middle rack for 35 minutes or until golden brown and set.
07 - Remove from oven and let cool for 5 minutes before portioning. Serve warm, garnished with extra milk or yogurt if desired.