01 - In a medium mixing bowl, combine the rolled oats, milk, cooled espresso, chia seeds, maple syrup, and vanilla extract. Stir thoroughly until every oat is coated and the mixture is uniform.
02 - Divide the oat mixture evenly between two serving jars or airtight containers, pressing gently to level the surface.
03 - In a small bowl, whisk together the mascarpone cheese, Greek yogurt, and maple syrup until completely smooth and lump-free, forming a silky cream.
04 - Spoon the mascarpone cream over the oat base in each jar, spreading it into an even, generous layer to mimic traditional tiramisu.
05 - Seal the jars tightly and refrigerate for at least 8 hours, allowing the oats to absorb the liquid and soften to a creamy consistency.
06 - In the morning, finish each jar with a dusting of cocoa powder and a scattering of dark chocolate shavings. Add crumbled ladyfinger pieces and a light drizzle of espresso if desired. Serve chilled, stirring the layers together or scooping through each one for the full tiramisu experience.