Preheat your oven to 400°F (200°C).
In a large mixing bowl, toss the diced sweet potatoes with olive oil, salt, and pepper until evenly coated. Spread them in a single layer on a baking sheet lined with parchment paper or a silicone mat.
In a separate bowl, toss the chickpeas with a drizzle of olive oil, salt, smoked paprika, garlic powder and cumin. Spread them on another baking sheet lined with parchment paper or a silicone mat.
Roast the sweet potatoes and chickpeas in the preheated oven for about 20-25 minutes or until the sweet potatoes are tender and slightly caramelized, and the chickpeas are crispy.
While the sweet potatoes and chickpeas are roasting, prepare the dressing by whisking together the extra-virgin olive oil, balsamic vinegar, maple syrup or agave nectar, Dijon mustard, salt, and pepper in a small bowl. Set aside.
In a large salad bowl, add the torn kale leaves. Pour half of the dressing over the kale and use your hands to massage the dressing into the leaves to help soften them.
Once the sweet potatoes and chickpeas are done roasting, allow them to cool slightly before adding them to the salad bowl with the kale.
Drizzle the remaining dressing over the salad and toss everything together to combine.
To serve, sprinkle the crumbled vegan feta cheese over the top of the salad, followed by the toasted sunflower seeds. Add avocado sliced or cubed on the side (optional) before serving.