To make bread pudding with a hard baguette, you will need eggs, milk, sugar, vanilla extract, and cinnamon. Cut the baguette into cubes and place them in a baking dish. Mix together eggs, milk, sugar, vanilla extract, and cinnamon and pour the mixture over the bread cubes. Bake in the oven at 180°C (350°F) for 30-40 minutes until golden brown.