In a medium saucepan, combine the quinoa and water or broth. Bring the mixture to a boil, then reduce the heat to low. Cover and simmer for about 15 minutes or until the liquid is fully absorbed. Fluff the grains with a fork and set aside.
Preheat your oven to 400°F (200°C). Toss the cubed sweet potatoes with olive oil, salt, and pepper on a baking sheet. Roast for 20 minutes or until they are tender and slightly browned on the edges.
If you are using leftover turkey, lightly warm it in a skillet over medium heat with a splash of water or broth to keep it moist. If you are using fresh turkey, ensure it is fully cooked and seasoned to your preference.
Place the baby kale or spinach in a large mixing bowl. If using kale, you can massage it with a tiny bit of olive oil for a minute to soften the texture and make it easier to digest.
Divide the cooked quinoa among four bowls. Top each bowl with a portion of the greens, roasted sweet potatoes, and turkey. Sprinkle the dried cranberries, chopped walnuts, and feta cheese evenly over the top.
Drizzle your favorite balsamic vinaigrette or a lemon-tahini dressing over each bowl. Season with an extra pinch of black pepper if desired, and serve immediately.