01 - Preheat oven to 350°F. Line a baking sheet with parchment paper.
02 - In a medium bowl, whisk together oats, cooked quinoa, flour, baking soda, cinnamon, and salt until evenly blended.
03 - In a large bowl, cream the butter, brown sugar, and granulated sugar until light and fluffy, about 2-3 minutes.
04 - Beat in the egg and vanilla extract until the mixture is smooth and well combined.
05 - Gradually mix the dry ingredients into the wet ingredients, stirring until just combined. Do not overmix.
06 - Fold in the raisins or chocolate chips and nuts, if using, until evenly distributed throughout the dough.
07 - Scoop heaping tablespoons of dough onto the prepared baking sheet, spacing them 2 inches apart to allow for spreading.
08 - Bake for 10-12 minutes, or until edges are lightly golden and centers appear set.
09 - Let cookies cool on the baking sheet for 5 minutes, then transfer to a wire rack to cool completely. Serve warm or at room temperature.