Preheat the oven to 350°F (175°C).
Grease a 9x13 inch baking dish.
Cut the bread into cubes or triangles.
Spread the bread evenly in the prepared dish.
In a large mixing bowl, whisk together eggs, milk, heavy cream, sugar, vanilla, and cinnamon until well combined.
Pour the custard mixture over the bread, ensuring all pieces are well soaked.
Gently fold in the berries or chosen fruit.
Cover the dish with foil and let sit for 30 minutes to 1 hour, or overnight in the fridge.
Remove the foil and bake in the preheated oven for 45-50 minutes, or until set and golden brown.
Let it cool for 10 minutes before slicing and serving.