Preheat oven to broil.
Crush the Teddy Grahams to a coarse consistency.
Schmere the chocolate hazelnut spread on each toasted baguette slice.
Top with crushed Teddy Grahams.
Place 4-5 mini marshmallows on each crostini.
Place them in the broiler for 3 minutes. Watch them carefully and remove them if they are turning golden brown too quickly and leave them a bit longer if they are not turning golden brown.
Remove them from the oven and garnish them with a Teddy Graham. Serve immediately.