Prep the Bread: Slice the French bread into thick cubes.
Grease the Pan: Butter your large baking dish very well.
Fill the Dish: Place the bread cubes into the dish evenly.
Mix the Custard: Whisk eggs, milk, cream, and sugar together.
Add Flavor: Stir in the vanilla, cinnamon, and nutmeg.
Pour Over Bread: Pour the egg mix over the bread cubes.
Press Down: Push bread down to soak up the liquid.
Chill Overnight: Cover and refrigerate for at least eight hours.
Make the Topping: Mix butter, brown sugar, and pecans later.
Bake the Dish: Spread topping and bake until golden brown.