Preheat oven to 350F. Line a baking sheet with parchment paper.
In a large bowl, whisk together the banana, oil, maple syrup, eggs, and vanilla until smooth.
In a high-speed blender, add the oats and blend for a few seconds just break them up into smaller pieces. Transfer to the bowl. Add the nuts/seeds to the blender and blend to chop up into a coarse meal (you want to have a mix of finely ground + small crunchy pieces rather than a fine meal). Transfer to the bowl.
Add the hemp seeds, cinnamon, salt, and baking soda and mix until thoroughly combined. Use a small cookie scoop to scoop the batter and place on the baking sheet. You can also just use a heaping tablespoon amount. You can either leave the cookies thick or press them down slightly to flatten them. Either way, make sure to top with chocolate!
Bake for 25-30 minutes or until the bottoms and edges are golden brown. Sprinkle some flaky salt on top of the chocolate, if using.