Step 1: Preheat your oven to 300°F (150°C) and line a large baking sheet with parchment paper.
Step 2: In a large mixing bowl, combine the rolled oats, protein powder, chopped almonds, chia seeds, cinnamon, and salt. Stir well to distribute the protein powder evenly.
Step 3: In a separate microwave-safe bowl, combine the nut butter and maple syrup. Heat for 15-20 seconds until runny, then whisk in the egg white and vanilla extract until the mixture is slightly frothy.
Step 4: Pour the wet mixture over the dry oat mixture. Fold everything together with a spatula until all the oats are thoroughly coated and no dry protein powder remains.
Step 5: Spread the granola onto the prepared baking sheet. For big clusters, press the mixture down firmly into an even layer using the back of a spoon.
Step 6: Bake for 25-30 minutes, or until the granola is fragrant and golden brown around the edges. Do not stir if you want large chunks.
Step 7: Remove from the oven and let the granola cool COMPLETELY on the baking sheet (about 45 minutes). It will crisp up as it cools. Once cold, break into clusters and store in an airtight container.