In a shallow dish, whisk together eggs, rooibos leaves (or coffee), milk, banana, and salt until smooth.
Dip each slice of Albany bread into the mixture, ensuring both sides are coated.
Heat a non-stick pan over medium heat and toast each slice for 2-3 minutes per side, until golden brown.
Remove from the pan, let cool slightly, then cut into bite-sized squares.
In serving glasses, layer the syrup, mascarpone mixture, and French toast pieces.
Repeat layers until the glass is filled, ending with a mascarpone layer.
Dust with cocoa powder (for coffee version) or rooibos powder (for tea version).
Serve immediately and enjoy!