To make sweet potatoes: Preheat the oven to 400F. Cut 1 large sweet potato into small cubes. Pour cubes on a baking sheet. Season with olive oil, garlic powder, and Italian seasoning. Bake for 40-45 minutes or until slightly crispy. To make dressing: Add all dressing ingredients (balsamic vinegar, maple syrup, Dijon mustard, olive oil, garlic powder, oregano, salt and pepper) to a small jar and shake vigorously until totally combined. To a large bowl, add all salad ingredients (kale, sliced honey crisp apples, pomegranate seeds, roasted sweet potatoes, goat cheese, walnuts) and mix in dressing when ready to serve.