In a medium bowl or container, combine the rolled oats, chia seeds, almond milk, vanilla extract, cinnamon, and salt.
Stir everything together thoroughly until well combined.
Cover and refrigerate overnight or for at least 4 hours to allow the oats and chia seeds to absorb the liquid.
In the morning, stir the porridge and add a splash of almond milk if you prefer a thinner consistency.
Divide into bowls and top with fresh berries or your favorite toppings before serving cold or warmed in the microwave.