Pre-heat oven to 350 F and lightly grease a baking sheet.
Combine all ingredients—the cooked quinoa, peanut butter, maple syrup, quick-cooking oats, cocoa powder, and salt—in a large mixing bowl just until well combined.
Drop the mixture by a large spoonful onto the prepared baking sheet.
Bake in the oven for 18 to 20 minutes, until lightly firm.