Preheat oven to 325°F. Line a large baking sheet with parchment paper or a silicone mat.
In a small bowl, combine the ground flaxseed and water. Stir to combine and set aside to thicken for 5 minutes.
In a large bowl, combine the rolled oats, almond flour, cinnamon, salt, baking soda, coconut, pumpkin seeds, pecans, and chocolate chips. Stir to combine.
In a medium bowl, combine the avocado oil, peanut butter, maple syrup, vanilla, and the thickened flaxseed mixture. Whisk until thoroughly combined and creamy.
Add the avocado oil mixture to the dry ingredients in the largo bowl. Using a spatula, stir until you have a thick batter and all ingredients are thoroughly combined.
Using a scant ¼ cup measure, scoop up the batter and bang it out onto the prepared baking sheet. Repeat with the remaining dough.
Flatten each portion of dough out with your palm while simultaneously shaping the sides of the cookie with your other hand. You want solid edges; not craggy ones. Top each cookie with a sprinkle of millet.
Bake the vegan breakfast cookies for 28-30 minutes, or until golden brown and slightly firm. Let them cool thoroughly (at least one hour) before storing in a loosely covered container/aluminum foil/Beeswrap setup (see headnote) at room temperature for up to 5 days.