Buttery flaky croissants make this the most delicious bread pudding.
Whisk together egg, half and half, sugar, cinnamon and vanilla. Set aside.
Break up the croissants into chunks. Fill both baking pans with the croissant pieces.
Pour the custard mixture over the croissant chunks and gently push the croissants down to absorb the custard.
Carefully add hot water around the pans about halfway up the outside of the pans.