Heat the oven to 425. Line a rimmed large metal baking sheet with parchment paper, then toss the sweet potato and cauliflower in enough oil to lightly coat. Roast for 15 minutes, flip, then roast for another 15 minutes or until tender. Set aside.
Meanwhile, whisk the sauce ingredients together until well combined. Taste, and adjust the ingredient amounts to your liking.
When the sweet potato and cauliflower are done cooking, transfer to a bowl. Increase the oven temperature to 450. Carefully toss the kale in enough oil to coat, then roast for 5 minutes, or until crisp along the edges. Add the roasted kale to the other veggies.
Drizzle the veggies with the sauce, then sprinkle with Gomasio. I had sauce leftover.