1. Grease a casserole dish lightly. Cut the sweet bread or brioche into bite-sized pieces and place in the casserole dish. Sprinkle the blueberries all over the bread. Set aside.

2. Add the milk, sugar (or xylitol), butter, vanilla extract, and salt to a saucepan and heat up so the butter can melt. Stir constantly and bring to a boil, then remove from the heat and let cool down for about 5 minutes. Whisk the eggs in a small bowl, then add to the cooled milk and mix well to combine. Pour over the bread and blueberries – every piece of bread should get some of that milk mixture. Set aside and let soak for about 10 minutes.

3. Preheat the oven to 350°F (180°C). Sprinkle the bread with some coarse sugar and bake for 30-35 minutes until nicely browned. Take out of the oven and let cool down a bit. Serve warm with vanilla sauce or maybe vanilla ice cream.