01 - In a medium mixing bowl, combine the rolled oats, milk, cooled espresso, chia seeds, maple syrup, and vanilla extract. Stir thoroughly until all ingredients are evenly incorporated.
02 - Divide the oat mixture evenly between two serving jars or airtight containers, dividing it equally.
03 - In a small bowl, whisk together the mascarpone cheese, Greek yogurt, and maple syrup until the mixture is completely smooth and creamy with no lumps remaining.
04 - Spoon the mascarpone cream mixture over the oat base in each jar, spreading it into an even, thick layer on top.
05 - Seal the jars tightly with lids and refrigerate for at least 8 hours or overnight to allow the oats to absorb the liquid and soften.
06 - In the morning, top each jar with dark chocolate shavings and a generous dusting of cocoa powder. Add crumbled ladyfinger pieces and a light drizzle of espresso if desired. Serve chilled—stir everything together or enjoy each creamy layer separately for an authentic tiramisu experience.