In a mason jar or airtight container, combine rolled oats, milk, Greek yogurt, chia seeds, maple syrup, cinnamon, and vanilla extract. Stir until well combined.
Seal the jar and refrigerate overnight, or for at least 6 hours. During this time, the oats will absorb the liquid and soften.
The next morning, stir the oats to mix, and if you like, add more milk to reach your preferred consistency.
Top with fresh berries, almonds, and pumpkin seeds. You can also add a drizzle of honey or more cinnamon for extra flavor.
Notes
This recipe is versatile! You can add other toppings like granola, sliced bananas, or shredded coconut. For extra protein, consider adding a scoop of protein powder to the oats.