In your jar or bowl, add the rolled oats, pumpkin spice, chia seeds (if using), salt, and chopped nuts. Gently stir to evenly distribute the spices and nuts.
In a separate bowl or measuring cup, whisk together the almond milk, pumpkin puree, maple syrup, and vanilla extract until smooth and well blended.
Pour the wet ingredients over the dry mixture. Stir thoroughly to ensure every oat is coated and the pumpkin and spices are evenly mixed.
Seal the jar or cover the bowl tightly. Place it in the refrigerator for at least 6 hours or overnight to allow the oats to soak up the liquid and flavors fully.
In the morning, give your oats a good stir. If you prefer a thinner consistency, add a splash of milk. Top with extra nuts, a drizzle of maple syrup, or fresh fruit if desired. Then dig in and enjoy the warm fall flavors.