Adjust two racks in the upper and lower third of the oven and preheat to 400°F.
In a medium bowl, stir together the cooked quinoa, 1 ½ tablespoons avocado oil (double this amount if doubling the recipe), herbes de Provence, a third of the garlic powder, and a big pinch of Kosher salt and freshly ground black pepper.
On a sheet pan, toss the sweet potato slices with 1 tablespoon avocado oil (double this amount if doubling the recipe), the remaining garlic powder, and a generous amount of Kosher salt and freshly ground black pepper.
Place the quinoa on the upper rack and the sweet potatoes on the bottom rack and roast for 20-25 minutes, mixing the quinoa halfway, until it’s golden and crispy and the sweet potatoes are tender. Remove from the oven and let cool. Taste crispy quinoa and season with more Kosher salt, if needed.
Mix the Maple Tahini Dressing with the water to loosen it slightly. In a large bowl, combine the arugula, pomegranate seeds, sweet potatoes, and crispy quinoa with as much of the Maple Tahini Dressing as desired. Season with Kosher salt and toss to evenly combine.