Preheat the oven to 200 degrees °C or 392 °Fahrenheit.
Soak the raisins in the briefly heated rum.
Making the Bread Pudding
Cut the bread in smaller pieces and layer them in the oven dish.
Mix the eggs, milk, rum and raisins in a bowl.
Pour the egg mixture in the oven dish on top of the bread. Press several times on the bread, just to make sure that all the liquid is soaked up by the bread.
Cover the oven dish with some aluminum foil and bake the dish for 10 minutes. Then take off the foil and bake the dish for another 30 minutes.
Serving
Serve the delicious bread pudding with syrup, powdered sugar and vanilla ice cream.