In a bowl, whisk together eggs, milk, sugar, vanilla and cinnamon until well combined. Add cubed bread and toss gently until the egg mixture is absorbed. Add berries and toss gently to combine.
Divide muffin mixture evenly into a greased muffin tin and drizzle with maple syrup. Bake in the centre of a preheated 375°F (190°C) oven for 25 min. Cool completely then wrap individually in plastic wrap and store in a resealable plastic bag or container to freeze. To reheat frozen muffins, remove plastic wrap and place in microwave on defrost for 1 min. If desired, drizzle warm muffins with a little more maple syrup before serving.
To freeze now and bake later, place the muffin tin in the freezer until batter is solid and remove "pucks" to a freezer bag for storage (they don’t have to be wrapped individually). Bake from frozen either in a muffin tin or on a baking sheet. NOTE: Total Time: 40 min. from frozen, 35 min. from fresh.