1. Prepare the Apple Filling: In a small skillet, melt 1 tablespoon of unsalted butter over medium heat. Add the finely diced apple, 1/2 teaspoon of ground cinnamon, and the brown sugar. Cook, stirring occasionally, for 5-7 minutes, or until the apples are tender but still hold their shape. Remove from heat and set aside.

2. Prepare the French Toast Batter: In a shallow dish or pie plate, whisk together the eggs, milk, remaining 1/2 teaspoon of ground cinnamon, nutmeg, granulated sugar, and vanilla extract until well combined and slightly frothy.

3. Cut the Bread: Take each slice of bread and cut it into 3-4 equal “sticks.” You can cut them lengthwise or widthwise, depending on your preferred stick size.

4. Dip the Bread Sticks: Working in batches, quickly dip each bread stick into the egg batter, ensuring all sides are coated but not overly saturated. You want the bread to absorb some of the liquid, but not become soggy.

5. Cook the French Toast Sticks: In a large non-stick skillet or griddle, melt the remaining 1 tablespoon of unsalted butter over medium heat. Once the butter is melted and shimmering, place the dipped bread sticks in a single layer, ensuring not to overcrowd the pan.

6. Brown and Finish: Cook for 2-3 minutes per side, or until each side is golden brown and cooked through. You may need to flip them a few times to get an even color. Repeat with remaining bread sticks, adding more butter to the pan if needed.

7. Assemble and Serve: Once all the French toast sticks are cooked, arrange them on a serving platter. Spoon the warm apple cinnamon mixture over the top of the sticks. Dust with powdered sugar, if desired, and serve immediately with a side of maple syrup for dipping.