01 - In a medium mixing bowl, combine the rolled oats, milk, cooled espresso, chia seeds, maple syrup or honey, and vanilla extract. Stir thoroughly until all ingredients are evenly incorporated.
02 - Divide the oat mixture evenly between two jars or airtight containers, ensuring an even distribution.
03 - In a small bowl, whisk together the mascarpone cheese, Greek yogurt, and maple syrup or honey until the mixture is smooth, creamy, and free of lumps.
04 - Spoon the mascarpone mixture over the oat base in each jar, spreading it into an even, thick layer on top.
05 - Seal the jars or containers tightly and refrigerate for at least 8 hours to allow the oats to soften and the flavors to meld.
06 - In the morning, finish each jar with a generous dusting of cocoa powder and dark chocolate shavings. Add crushed 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.