Preheat the oven to 375 F/ 190 C/gas mark 5. You will need a medium size casserole dish approx. 6 cm deep.
Tear up the bread/buns and place in your casserole dish (they should be nice and snug).
Mash the bananas using a fork. In another bowl whisk together the eggs and milk, combine with the bananas and stir well.
Pour the mixture over the bread, stir thoroughly and set aside for 5 minutes. Give another stir, sprinkle the sugar, drizzle the melted butter over the whole thing and bake in the centre of the oven for 30-35 minutes.
Remove from the oven and serve immediately.
Notes
There is no need to soak the mixture overnight.
I recommend using very ripe/overripe bananas because they are sweeter than firm, not quite ripe ones. As most of the sweetness comes from the bananas they need to be as sweet as possible. So overripe are best!
I also recommend mashing the bananas using a fork, not pureeing. You'll be able to better appreciate the sweet baked banana pieces tucked in between the bread chunks.
This french toast casserole with bananas is best served hot straight from the oven. Leftovers can be reheated in the microwave.
Delicious on its own, with a drizzle of maple syrup, a handful of fresh berries, fruit compote or chocolate sauce.
Regular milk can be replaced with any plant-based milk.
Substitute light brown or cane sugar for the demerara if preferred.
Extras: Add half a teaspoon of cinnamon or chocolate chips into the egg mixture if desired. You can also scatter flaked almonds or flaxseed over the top for extra crunch before drizzling with the melted butter.
Baking times may vary depending on the depth of your casserole dish.