Preheat your oven to 375°F (190°C). Pour the melted butter onto a large rimmed baking sheet and brush it to coat the bottom evenly.
Whisk the eggs, milk, cream, sugar, vanilla, cinnamon, and nutmeg in a large shallow bowl until fully combined and smooth.
Dip each slice of bread into the custard mixture. Let it soak for about 2-5 seconds per side depending on freshness. Allow excess to drip off.
Arrange the soaked bread slices on the prepared baking sheet in a single layer. Ensure they are not overlapping.
Bake for 12 to 15 minutes. Remove from oven briefly to flip each slice over.
Return to oven and bake for another 5 to 7 minutes until golden brown and slightly puffed.
Serve immediately with maple syrup, fresh fruit, or powdered sugar.