Preheat a non-stick skillet or griddle over medium heat.

In a bowl, whisk together the eggs, milk, vanilla extract, and ground cinnamon.

Dip each slice of bread into the egg mixture, allowing it to soak on both sides.

In the heated pan, add a little butter or oil, then toss the sliced apples and sprinkle with sugar and cinnamon.

Sauté the apples for about 2-3 minutes until slightly softened.

Cook the soaked bread slices until golden brown, about 3-4 minutes on each side.

Serve the French toast warm with caramelized apples on top, drizzle with maple syrup, or add whipped cream and powdered sugar.