To a large bowl, add in the eggs, milk, maple syrup, vanilla, cinnamon and nutmeg. Whisk until incorporated.
Spray a slow cooker with non-stick spray. Place the cubed bread in the slow cooker and then place the chopped pecans on top of the cubed bread.
Pour the egg mixture over the bread and make sure it is all covered by the egg mixture. You might have to give it a little stir.
To make the cinnamon topping, combine the butter, brown sugar and cinnamon in a small bowl and stir until crumbly. Place over the top of the of french toast. Cook on low for 3-4 hours or until it has set. Serve with maple syrup and powdered sugar on top. Enjoy!