It's an old-fashioned southern recipe where nothing goes to waste; the pudding itself just uses egg yolks, so of course, you would top it with the leftover egg whites. It's actually not banana ...

When ready to serve, slice remaining 1 banana, and place in an even layer over top of mascarpone mixture. Roughly crumble 3 vanilla wafers over top, and sprinkle with chocolate shavings as desired.