Preheat oven to 350°F. In a large mixing bowl, combine the peanut butter, egg whites, vanilla, and sugar. Stir until smooth. Add the oatmeal and peanuts and stir again until well combined.
Line a large baking sheet with parchment and scoop the oatmeal mixture onto the parchment. Spread across the parchment, leaving plenty of small bite-size chunks of granola. Bake for 10 minutes. Let cool and then transfer to an airtight container. Enjoy!
Notes
Maple sugar and brown sugar can both be used in this recipe. I kept the sugar amounts minimal, but if you'd prefer a sweeter granola, you can easily increase the sugar amount up to twice as much without affecting the end result.