In a medium bowl, whisk together the eggs, milk, sugar, vanilla extract, cinnamon, and nutmeg until combined.
Brush the melted butter onto a griddle or large pan over medium heat.
Soak the bread in the egg mixture for 1-2 minutes per side.
Add the bread to the griddle and cook until golden brown, about 2-3 minutes per side.
Sprinkle the diced apples over the French toast and cook for 1 minute.
Serve the French toast with fresh fruit, a drizzle of syrup, and a sprinkle of powdered sugar, if desired.