In a bowl or jar, combine the oats, milk, coffee, maple syrup, cocoa powder, vanilla, and salt. Stir well, cover, and refrigerate overnight.
In a separate bowl, whisk the mascarpone, heavy cream, maple syrup, and vanilla until smooth and slightly thickened, similar to lightly whipped cream. Cover and refrigerate overnight as well.
The next morning, divide the oat mixture between two jars or glasses.
Spoon the mascarpone mixture over the top of each.
Dust with cocoa powder and top with crushed ladyfingers or amaretti just before serving.