Make the custard

• Whisk the eggs, milk, cinnamon and vanilla extract in a mixing bowl until smooth.

Stuff the bread

• Spread Nutella generously over two bread slices.
• Top with the remaining slices and press the edges to seal, making two sandwiches.

Soak the sandwiches

• Dip each sandwich in the custard, turning to coat both sides without letting it get soggy.

Fry the French toast

• Melt the butter in a frying pan over medium heat.
• Cook the sandwiches until golden brown on both sides.

Serve

• Dust with powdered sugar and serve warm.