01 - In a medium bowl, combine the rolled oats, milk, brewed espresso or coffee, chia seeds, maple syrup or honey, and vanilla extract. Stir until evenly incorporated.
02 - Divide the oat mixture evenly between two jars or airtight containers, smoothing the surface.
03 - In a small bowl, whisk together the mascarpone cheese, Greek yogurt, and maple syrup or honey 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.
05 - Cover the jars securely and refrigerate for at least 8 hours or overnight to allow the oats to soften and flavors to meld.
06 - In the morning, top each jar with dark chocolate shavings and a dusting of unsweetened cocoa powder. Add ladyfinger pieces and an extra drizzle of coffee if desired. Serve chilled—stir together or enjoy each layer separately for a true tiramisu experience.