In a large mixing bowl, combine the rolled oats, chopped almonds, sunflower seeds, flax seeds, pumpkin seeds, and coconut flakes.
Add the chopped dried apricots, cinnamon, and sea salt to the bowl and stir everything together until well combined.
Transfer the muesli to an airtight container or glass jar for storage at room temperature.
To serve, place 1/2 cup of muesli in a bowl and add your choice of milk, yogurt, or let it soak overnight in the refrigerator for a softer texture.
Store remaining muesli in the sealed container for up to 3 weeks, and customize each serving with fresh fruit if desired.