Beat the eggs together with the vanilla and cream. Heat the butter in a large non-stick frypan over medium heat. When butter is sizzling, dip brioche slices in egg mixture, then place in the pan. Cook brioche for 2 minutes on each side, or until golden.
To serve, stack 2 slices of French toast on each plate, then top with slices of banana and a small dollop of creme fraiche. Drizzle with maple syrup and dust with cinnamon.
