Preheat oven to 375 degrees F. Grease/spray an 8×8 square baking pan.
In a large bowl, add the oats, cinnamon, nutmeg, baking powder, salt, and ground flaxseed. Stir with a spatula until well combined.
Add the almond milk, applesauce, maple syrup, cashew butter, and vanilla extract. Stir until everything is well combined.
Fold in the diced apples and pecans.
Pour mixture into the prepared pan. Sprinkle on a few extra diced apples and pecans on the top. Bake for 40-45 minutes until top is set and golden brown. Let it cool for 10 minutes before serving. Enjoy warm and serve with a drizzle of cashew butter or any nut butter, a splash of almond milk, vegan yogurt, and/or more maple syrup.
Store leftovers in the fridge. To reheat, microwave with a splash of milk.