1. 1. Preheat your oven to 180°C (350°F) and line a baking sheet with parchment paper

2. 2. In a medium bowl, combine 100 g (1/2 cup) granulated sugar and 15 g (2 tablespoons) flour

3. 3. Add 225 g (1/2 pound) frozen blueberries to the bowl and gently toss until evenly coated

4. 4. Spread the coated blueberries in a single layer on the prepared baking sheet

5. 5. Bake for 20 to 25 minutes, until the blueberries release their juices and the mixture begins to caramelize slightly

6. 6. While the blueberries bake, place 50 g (1/2 cup) white chocolate pieces in a heatproof bowl and melt either over a double boiler or in the microwave in 30-second intervals, stirring well between each

7. 7. Once smooth, remove the baked blueberries from the oven and let cool for 5 minutes

8. 8. Drizzle the melted white chocolate evenly over the warm blueberries, using a spoon or spatula to spread it across the surface

9. 9. Transfer the tray to the refrigerator and chill for at least 30 minutes to set the chocolate before serving

10. 10. Handle hot baking trays with oven mitts to prevent burns

11. 11. Melt white chocolate carefully to avoid overheating