Step 1: Place the dry rolled oats and chia seeds into a 16-ounce wide-mouth mason jar.
Step 2: Pour in the milk, Greek yogurt, maple syrup, and vanilla extract.
Step 3: Stir the mixture vigorously to ensure the chia seeds are evenly distributed. Let the jar sit uncovered for 5 minutes, then stir it a second time to prevent the seeds from clumping at the bottom.
Step 4: Secure the lid tightly on the jar and place it in the refrigerator to soak for at least 4 hours, or preferably 8 hours (overnight).
Step 5: Remove from the fridge in the morning, add your favorite fresh toppings like sliced berries or nuts, and enjoy cold (or heat in the microwave for 60-90 seconds if preferred).
