Combine the rolled oats, chia seeds, and salt in a bowl or jar. Add the oat milk, maple syrup, and vanilla, then stir well.

If layering, spoon half the mixture into a jar, add a layer of fruit, then top with the remaining oats. Cover and refrigerate at least 4 hours, preferably overnight.

Stir the chilled oats, adjust consistency with more oat milk if desired, and add your favourite toppings. Serve cold.