Preheat oven to 300°F and line a large baking sheet with parchment paper
In a large bowl, combine oats, sliced almonds, chia seeds, flax seeds, and hemp seeds
In a separate bowl, whisk together power butter, maple syrup, melted coconut oil, vanilla, cinnamon, ginger, nutmeg, and salt
Pour wet ingredients over dry ingredients and mix thoroughly until everything is well coated
Spread mixture evenly on prepared baking sheet
Bake for 20-25 minutes, stirring halfway through, until golden brown
Let cool completely on the baking sheet (this is crucial for clumping!)
Once completely cool, stir in chopped dark chocolate
Store in airtight container for up to 2 weeks