Preheat oven to 320°F (160°C).
In a mixing bowl, combine rolled oat, walnut, pepitas, sunflower seeds, cashew, and cinnamon powder. Transfer it to a baking tray and bake for 12 minutes. After 12 minutes, remove from oven, stir the mixture, and sprinkle the coconut flakes on top, then bake again for 3 minutes.
After done baking, transfer it to a mixing bowl and combine it with the rest of the ingredients. Store in an airtight container.