Slice French bread into 1 inch chunks.
Add bread slices to a lightly greased, flat baking dish.
In a large bowl, combine the eggs, milk, half-and-half, sugar, vanilla, cinnamon, nutmeg and salt; whisk until blended.
Pour mixture over the bread slices, making sure all are covered evenly with the milk-egg mixture.
Spoon some of the mixture in between the slices in the baking dish.
In a medium bowl, combine melted butter, brown sugar, cinnamon, pecans; blend well.
Cover with plastic wrap and refrigerate overnight or up to 24 hours.