01 - In a medium bowl, combine oats, milk, yogurt, chia seeds, maple syrup, and vanilla extract. Stir thoroughly until well incorporated.
02 - In a small bowl, whisk together espresso, mascarpone cheese, cocoa powder, and maple syrup until completely smooth and creamy.
03 - Spoon half of the oat mixture evenly into two jars or bowls.
04 - Top each jar with half of the tiramisu mixture, spreading gently to cover the oats.
05 - Add remaining oat mixture to each container, followed by the remaining tiramisu layer.
06 - Cover containers and refrigerate overnight for at least 8 hours to allow flavors to meld and oats to soften.
07 - Before serving, dust generously with cocoa powder and sprinkle with chocolate shavings if desired.