01 - In a medium mixing bowl, whisk together the rolled oats, milk, Greek yogurt, chia seeds, maple syrup, vanilla extract, and a pinch of salt until evenly combined.
02 - Gently fold in the blueberries, lemon zest, and lemon juice, stirring just enough to distribute the fruit and citrus flavor without crushing the berries.
03 - Divide the mixture evenly between two jars or airtight containers, smoothing the tops with a spatula.
04 - Seal the containers tightly and refrigerate for at least 8 hours, allowing the oats and chia seeds to absorb the liquid and thicken into a creamy consistency.
05 - In the morning, stir each portion well. Add a splash of milk if a thinner, looser texture is preferred.
06 - Top with chopped nuts, additional blueberries, and a sprinkling of lemon zest. Serve chilled, or warm gently in the microwave if desired.