Place an empty small-medium sized cast iron or baking dish in the oven, then preheat oven to 365°F.

In a shallow bowl, whisk egg, sugar, milk, and 1/2 tsp cinnamon until everything is well combined.

Dip both sides of bread slice in egg mixture, make sure they are evenly coated.

Once baking dish is heated, remove from oven, then immediately add butter to the baking dish. Once the butter is melted, add the bread slice to the baking dish.

Arrange the apple slices over the bread, then brush a thin layer of melted butter on top of the toast and the apple slices, then sprinkle more ground cinnamon on top.

Bake at 365°F for 20-22 minutes.

Once done, sprinkle some powdered sugar or drizzle some honey on top, then top it off with some chopped nuts (if desired) before serving.

Serve warm & enjoy!