In a large mixing bowl, combine the rolled oats, almond milk, diced apple, chia seeds, ground cinnamon, and maple syrup (if using). Add a pinch of salt to enhance the flavors. Stir the mixture thoroughly until all ingredients are well incorporated.
Divide the oat mixture evenly into 4 mason jars or airtight containers. Ensure each container has enough space for the oats to expand.
Seal each jar or container with its lid and place them in the refrigerator overnight, or for at least 4-5 hours. This will allow the oats to absorb the liquid and soften, resulting in a creamy texture.
In the morning, take your jars out of the fridge and give each mixture a good stir. If the mixture feels too thick for your preference, add a splash more almond milk to achieve your desired consistency.
Serve each portion with a generous dollop of Greek yogurt (if using) for creaminess. Sprinkle a little extra cinnamon on top, and garnish with additional apple slices for a fresh touch.
If you’d like to add a delightful crunch, sprinkle some chopped walnuts or pecans over the top of each serving.
Notes
Present the overnight oats in charming mason jars for a rustic aesthetic.