Add 1 cup rolled oats to a pan on the stove set to medium heat.
Cook, stirring constantly for 2-3 minutes or until the oats are fragrant and lightly toasted.
Transfer the toasted oats to a bowl.
Add 1 cup chopped dark chocolate to a pan on the stove set to low heat (you can use the same pan you used to toast the oats).
Cook, stirring constantly until the chocolate has melted, then immediately remove the pan from the heat.
Set aside 2 tablespoons of the toasted oats for the topping, then add the rest of the oats to the pan of melted chocolate.
Mix well, ensuring the oats are completely coated in melted chocolate.
Scoop out 1 tablespoon of the chocolate coated oats and place it on a sheet pan or large plate lined with parchment paper.
Immediately add a small sprinkle of the plain toasted oats on top of the chocolate oat cluster.
Repeat steps 8-9 with the rest of the chocolate oat mixture (you should end up with about 18 clusters).
Place the sheet pan or plate in the fridge for at least one hour to let the clusters chill before serving.