1. Preheat your oven to 350°F (175°C) to prepare for baking.
2. Grease a baking dish with melted butter or cooking spray to prevent sticking.
3. If using fresh bread, cut it into 1-inch cubes, spread them on a baking sheet, and dry them in the oven at 300°F for 10-20 minutes until they are dry but not browned.
4. Whisk together eggs, sugar, vanilla extract, cinnamon, and nutmeg in a large mixing bowl until well combined.
5. Gradually pour in the milk while whisking to create a smooth custard mixture.
6. Place the bread cubes in an even layer inside the greased baking dish.
7. Sprinkle raisins or optional fruits over the bread cubes if desired for added flavor.
8. Pour the custard mixture over the bread cubes, ensuring each piece is soaked thoroughly. Use a spatula to press down lightly.
9. Let the bread soak in the custard for 10-15 minutes to absorb the liquid fully.
10. Place the baking dish in the preheated oven and bake for 45-60 minutes, or until the center is set but slightly jiggly, and the top is golden brown.
11. If making vanilla sauce, combine butter, heavy cream, brown sugar, and vanilla in a saucepan over medium heat. Stir continuously until the mixture thickens, then set it aside to cool.
12. Once the bread pudding is baked, allow it to cool for 10 minutes before serving.
13. Drizzle warm vanilla sauce over individual servings of bread pudding for an enhanced flavor.
14. Serve and enjoy with optional toppings like ice cream, powdered sugar, or fresh fruit for added indulgence.