If you are using the dressing, make it first so it has time to sit and the flavors to marry.
In a 1 or 2-cup measuring cup, combine the oil, vinegar, mustard, garlic powder, onion powder, herbs and pepper flakes, if using. Taste for salt and pepper and add as desired. Set the dressing aside while you make the quinoa.
Bring the stock and bouillon up to a boil in a saucepot with a lid. Carefully taste. Add any salt and/or pepper as needed. If you used the bouillon, you probably won’t need to add any extra salt.
Add the quinoa, stir, and place the lid on the pot. Bring back up to a boil.
Turn the heat to a low simmer.
Simmer the quinoa for 15 to 25 minutes or until the liquid is absorbed. (Begin checking after 15 minutes.) Remove the pot from the heat and allow it to sit for 5 minutes.
While the quinoa is cooking, heat the oil in a medium sauté pan over medium heat.
Add the onion, carrots, bell pepper and squash. Add a pinch of salt and pepper, to taste.
Sauté the vegetables, stirring often, until just softened, approximately 5 to 10 minutes, depending on your heat source. Remove the pan from the heat, do not cover the vegetables.
Carefully remove the (hot) lid off the quinoa and fluff with a fork.
Add the cooked veggies and peas; gently toss together. Stir the dressing and drizzle over the quinoa, and gently toss again.
Sprinkle with parsley and serve.