In a large jar or container, combine the rolled oats, milk, Greek yogurt, maple syrup, cinnamon, cloves, orange zest, vanilla extract, and salt.
Stir well to ensure all ingredients are evenly distributed.
Cover the jar or container and refrigerate for at least 4 hours, or preferably overnight.
In the morning, give the oats a good stir. If they seem too thick, add a splash of milk to reach your desired consistency.
Serve cold, topped with your favorite toppings. Enjoy!