For the Miso-ginger sauce Heat the oil in a sauté pan over medium-high heat; add the onion and sauté until caramelized. Combine the rest of the ingredients in a blender with the caramelized onions and puree until smooth. Reserve. For the quinoa Combine the quinoa, vegetable stock and salt in a medium-size saucepan with a tight fitting lid. Place the pan over high heat with the lid on and cook until steam starts to escape; turn the heat down low and allow the quinoa to cook for 20 minutes. Turn off the heat, let the quinoa sit for 5 minutes, then remove the lid and fluff the quinoa with a fork. Taste and adjust with salt if needed For the vegetable sauté Heat a large sauté pan over high heat; add the oil then the garlic. Cook for 30 seconds or so until the garlic is fragrant. Add the vegetables, cook until soft, then add 3/4 cup of the miso-ginger sauce or more to taste. Add optional ingredients at this time, if desired, and continue to cook until the sauce has coated the vegetables. Divide the cooked quinoa into 6 bowls, top with the vegetable sauté and chopped herbs. Serve.