1. Gather all ingredients and equipment before heating the pan to ensure a smooth workflow.

2. In a shallow bowl, whisk together the egg, milk, vanilla extract, ground cinnamon, sea salt, and nutmeg for about 30 seconds until fully combined.

3. Place an 8-inch skillet over medium heat for 1–2 minutes, then add the butter and swirl until it foams.

4. While the butter melts, position the bread slices nearby; use bread that is at least 1/2 inch thick.

5. Dip the first slice of bread into the custard for 2–3 seconds per side, allowing it to absorb without becoming soggy.

6. Immediately transfer the coated bread to the foaming butter and cook for 2.5–3 minutes, undisturbed, until the bottom is golden brown.

7. Flip the bread and cook the second side for 2–2.5 minutes until equally golden; add a small knob of butter if the pan becomes dry.

8. While the first slice finishes, dip the second slice in the remaining custard for 2–3 seconds per side, then cook it in the pan for 2.5–3 minutes per side.

9. Serve both slices immediately with your choice of toppings such as maple syrup, fresh berries, or powdered sugar.