(Optional) Preheat your pie irons over the fire while getting your supplies ready.
Place your slices of bread on a clean surface and spread cream cheese along one side of one piece of bread.
If you are adding berries to the sandwich, place them on the cream cheese.
Take your other slice of bread and made your sandwich.
Crack your egg into your bowl. Add your milk, vanilla, and cinnamon if using. Whisk these together.
Spray the insides of your pie irons.
Place your sandwich into your egg batter, then flip it over, so that both sides are covered.
Remove the sandwich and place it inside the pie iron.
Carefully close your cooker, making sure to latch it.
Continue with your remaining ingredients to create additional sandwiches, if necessary.
Cook over your fire, turning frequently, until the French toast has been browned to your satisfaction.
Serve with extra berries if available.