01 - Preheat oven to 350°F (175°C). Arrange cinnamon-raisin bread cubes in a baking dish.
02 - In a mixing bowl, whisk together milk or half-and-half, eggs, sugar, vanilla extract, and ground cinnamon until well blended. Pour the custard evenly over the bread cubes, pressing lightly to ensure all pieces are saturated.
03 - Bake for 45 minutes, or until golden brown and the center is just set. Serve warm as is, or garnish with cream if desired.