Preheat the oven to 325°F. Line a baking sheet with parchment paper.
In a large mixing bowl, combine the oats, rice cereal, protein powder, nuts, hemp hearts, and salt. Stir until well combined.
In another large mixing bowl, combine the egg whites, peanut butter, maple syrup, and olive oil. Stir until well combined.
Add the dry ingredients to the wet ingredients, and mix until the dry ingredients are thoroughly coated.
Spread the granola mixture onto the parchment-lined baking sheet. Press the mixture down into an even layer across the baking sheet.
Bake at 325°F on the center rack for 17-21 minutes, until the granola looks dry. (Keep an eye on the edges to ensure it does not burn. Pull from the oven early if the granola starts to get too dark along the edges.)
Remove from the oven and let sit on the pan to cool. The mixture will crisp up as it cools. Once cool, break into chunks (leaving clusters as big or small as you’d like) and add the dark chocolate chunks. Enjoy!