01 - In a medium bowl or jar, combine rolled oats, milk, Greek yogurt, chia seeds, maple syrup, and vanilla extract. Stir thoroughly until all components are well integrated.
02 - In a separate small bowl, toss the diced apple with ground cinnamon, nutmeg (if using), and lemon juice until evenly coated.
03 - Gently fold the prepared apple mixture into the oat base, ensuring uniform distribution throughout.
04 - Divide the combined mixture into two individual jars or containers. Cover securely and refrigerate for a minimum of 8 hours, or overnight.
05 - In the morning, stir the chilled oats. If a thinner consistency is desired, add a splash of milk. Garnish with chopped nuts, additional apple slices, and a drizzle of maple syrup before serving.