01 - In a medium bowl, combine rolled oats, milk, brewed espresso, chia seeds, maple syrup, and vanilla extract. Stir thoroughly until evenly incorporated.
02 - Divide the oat mixture evenly between two jars or airtight containers, pressing gently to level the surface.
03 - In a small bowl, whisk together mascarpone cheese, Greek yogurt, and maple syrup until smooth and creamy with no lumps remaining.
04 - Spoon the mascarpone mixture over the oat base in each jar, spreading it into an even, thick layer on top.
05 - Cover each jar tightly and refrigerate for at least 8 hours or overnight to allow the oats to absorb the liquid and soften completely.
06 - In the morning, top each jar with dark chocolate shavings and a dusting of cocoa powder. Add ladyfinger pieces and a light drizzle of coffee if desired. Serve chilled, stirring together or scooping through each layer for a true tiramisu experience.