In a mason jar or a medium bowl, combine the oats, milk, Greek yogurt, chia seeds, maple syrup, vanilla extract, ground cinnamon, and salt. Stir vigorously for about 1 minute until fully mixed and creamy.

Carefully fold in the diced peaches into the oat mixture, incorporating them gently.

Cover and refrigerate for at least 4 hours, ideally overnight, to allow the oats to absorb flavors.

In the morning, give the oats a stir. If you prefer a looser texture, add a splash of milk and mix until combined.

Spoon into a bowl, top with extra diced peaches, and sprinkle with cinnamon. Serve cold.