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