Prepare the vegetables. Preheat the oven to 425℉ and line a baking tray with parchment paper. Place the cubed sweet potatoes and Brussels sprouts into a large bowl with a drizzle of olive oil, salt, and pepper. Evenly spread the vegetables onto the prepared baking sheet and bake for 20-25 minutes, until the sweet potatoes are soft and the Brussels sprouts cooked.
In the meantime, cook the quinoa. Pour 1 ⅓ cups of water into a small saucepot with a pinch of salt and bring it to a boil. Stir in the quinoa, cover the pot, and reduce the heat to a simmer. Cook for 15 minutes, until the water is absorbed and the quinoa is fluffy.
Grill the chicken. If needed, grill the chicken with your choice of seasonings, then chop them into bite-sized pieces and set aside.
Prepare the dressing. Add all of the dressing ingredients (except for the water) to a mason jar and screw the lid on top. Shake the jar vigorously until everything is well combined, then add water as necessary to thin into a dressing consistency.
Assemble the salad. Add your choice of greens to the bottom of a serving bowl. If using kale, add 1 tablespoon of the dressing to the greens and massage with your hands until softened, around 1-2 minutes.
Add the cooked quinoa, sweet potatoes, Brussels sprouts, pomegranate seeds, crumbled cheese, chopped pecans, and the reserved grilled chicken to the bowl. Top with the rest of the prepared dressing and toss well until combined. Serve immediately.
Store leftovers in the fridge with an airtight container for up to 3-4 days.