01 - In a medium bowl, combine oats, milk, yogurt, chia seeds, maple syrup, and vanilla extract. Stir thoroughly until all ingredients are well incorporated.
02 - In a small bowl, whisk together espresso, mascarpone cheese, cocoa powder, and maple syrup until smooth and creamy.
03 - Divide half of the oat mixture evenly between two jars or bowls, spreading it along the bottom.
04 - Top each jar with half of the tiramisu mixture, spreading gently to create an even layer.
05 - Add the remaining oat mixture to each jar, followed by the remaining tiramisu layer on top.
06 - Cover the jars or bowls and refrigerate for at least 8 hours to allow flavors to meld and oats to soften.
07 - Before serving, dust the tops with cocoa powder and sprinkle with dark chocolate shavings if desired.