Preheat your oven to 350°F and line a small loaf pan with parchment paper for easy removal.
In a small bowl, thoroughly mash the canned black beans with a fork until they form a smooth, consistent paste.
In a large mixing bowl, whisk together the rolled oats, chocolate protein powder, cooked quinoa, hemp seeds, cacao powder, and sea salt.
Add the mashed black beans, almond butter, maple syrup, vanilla extract, and water to the dry mixture.
Stir the ingredients vigorously with a sturdy spoon until a thick, sticky dough forms and all the protein powder is fully absorbed.
Transfer the dough to the prepared loaf pan and use the back of a spatula to press it firmly and evenly into the corners.
Bake for 15 to 18 minutes until the edges are set and slightly firm to the touch while the center remains soft.
Remove from the oven and allow the bars to cool completely in the pan before lifting the parchment and slicing into thick bars.