Creating Dark Chocolate Bread Pudding is a straightforward process if you follow these simple steps:

1. Preheat the Oven: Preheat your oven to 350°F (175°C). Grease a large baking dish with butter or cooking spray.
2. Prepare the Bread: Place the cubed bread into a large mixing bowl. Allow it to sit out for a few hours to dry out slightly.
3. Melt the Chocolate: In a saucepan over low heat, gently melt the chopped dark chocolate with the heavy cream. Stir until smooth and well combined.
4. Mix the Custard: In another bowl, whisk together the eggs, granulated sugar, vanilla extract, and salt until blended. Slowly add the milk while whisking.
5. Combine Mixtures: Pour the melted chocolate mixture into the egg mixture, stirring well to combine.
6. Soak the Bread: Pour the custard over the cubed bread. Press down gently to ensure all bread pieces are soaked. Let it sit for about 10-15 minutes.
7. Add Cinnamon: If using, sprinkle cinnamon over the bread mixture and give it a gentle stir.
8. Transfer to Baking Dish: Pour the entire mixture into the greased baking dish, spreading evenly.
9. Bake: Place it in the preheated oven and bake for 40-45 minutes, or until the top is golden brown and the custard has set.
10. Cool: Remove from the oven and allow it to cool for 10-15 minutes before serving.

These steps will guide you in creating this incredible bread pudding with ease.