Preheat oven to 180 degrees. Butter a large baking pan (13 x 9 inch) and set aside.
Cut the bread into smaller pieces and line the tray.
Whisk together the eggs, milk, vanilla essence and sugar till well combined and pour over the bread. Let stand for 10 minutes.
In a bowl, add in the oats, butter, brown sugar and cinnamon and mix with your hands till it resembles bread crumbs.
Sprinkle on top of the bread, along with the blueberries.
Bake for 40 minutes. Allow to rest for sometime and serve warm for breakfast.