Wash the fresh berries, remove the stem, and slice them into ¼ inch thin slices. Alternatively, you can mash them with a fork in a bowl.
Make the sandwich:
Spread Nutella on both slices of bread.
Place the strawberry slices on one side and close the sandwich. Spreading Nutella on both sides will prevent the strawberries from sliding out.
Pack it for lunch:
Place the Nutella strawberry sandwich in a lunch container where it fits snugly. Pack any sides, like fruits and veggies, in a separate compartment or container. Refrigerate until ready to pack inside a lunch bag, with or without an ice pack.