Variation: Instead of baking in a square pan bake individually. Place croissant pieces evenly in 10 (1/2-cup/118ml) ramekins; sprinkle with blueberries and pour cream cheese mixture evenly over croissant pieces. Let stand 20 minutes. Bake at 350°F/175°C/Gas mark 4 for 20 to 25 minutes or until set in center and golden brown.