01 - In a medium bowl, combine oats, milk, yogurt, chia seeds, maple syrup, and vanilla extract. Stir thoroughly until all ingredients are evenly incorporated.
02 - In a small bowl, whisk together espresso, mascarpone cheese, cocoa powder, and maple syrup until smooth and creamy. Ensure no lumps remain.
03 - Spoon half of the oat mixture into two jars or bowls. Top each with half of the tiramisu layer, spreading gently to create an even layer.
04 - Add the remaining oat mixture on top of the tiramisu layer, followed by the remaining tiramisu layer. Finish with the remaining oat mixture to create distinct layers.
05 - Cover jars or bowls securely and refrigerate for at least 8 hours or overnight to allow flavors to meld and oats to soften.
06 - Before serving, dust the top generously with cocoa powder and sprinkle with dark chocolate shavings if desired.