Easy Overnight Blueberry French Toast

blueberry jam or preserves (or your favorite seedless flavor)

package French bread, cut into 11⁄2-inch cubes

package cream cheese cut into 1-inch cubes

fresh blueberries, plus more for garnish

large eggs

milk

ground cinnamon

vanilla extract

⁄2 cup packed light brown sugar

Syrup, whipped cream and blueberries for topping if desired