Preheat oven to 350º. Grease a 8x8 or 11x7 pan.
When oven has reached 350º, place nuts on a baking sheet and toast for several minutes. Remove from nuts from oven to use later in recipe.
Mix rolled oats, nuts, cinnamon, baking powder, nutmeg and a dash of salt in a medium bowl.
In smaller bowl, add milk, maple syrup, eggs, coconut oil and vanilla extract and whisk until well mixed.
Add most of blueberries to bottom of baking pan (reserve a 1/2 cup of blueberries to add to top). Pour dry ingredients over blueberries and spread evenly.
Pour milk & egg mixture into pan. Gently shake pan to help distribute liquid through oats. Sprinkle the remaining berries on top.
Bake for 35 to 45 minutes until cooked thoroughly and golden brown on top. If using fresh blueberries, check at 35 minutes and at 40 minutes for frozen blueberries.