Position 2 oven racks in the upper and lower thirds of the oven and preheat the oven to 300 degrees F. Line 2 rimmed baking pans with parchment paper.
In a medium bowl, whisk the egg whites until foamy. Add the coconut oil, maple syrup, curry powder, cayenne and 3/4 teaspoon salt. Whisk to combine. In a large bowl, combine the oats, coconut chips, almonds, pecans, pepitas, sunflower seeds, flax seeds, sesame seeds and chia seeds. Toss to combine. Add the wet ingredients and stir to coat completely. Divide between the prepared baking pans.
Bake, flipping carefully only after 40 minutes to maintain large pieces, until golden and crispy, about 1 hour. Remove from the oven and sprinkle with Maldon salt, if using. Cool completely, then store in an airtight container for up to 2 weeks.