Preheat your oven to 400 F (200 C).
Peel and dice the 1 large sweet potato, then toss it with 2 Tablespoons olive oil, 1/2 teaspoon cumin, 1/2 teaspoon chili powder, 1/2 teaspoon garlic powder, 1/2 teaspoon salt, and 1/4 teaspoon onion powder, until well coated.
Spread the sweet potatoes on a baking sheet and roast for 20-25 minutes until caramelized and tender.
In a small bowl, add juice of 1 small lime, 2 Tablespoons olive oil, 2 teaspoons honey, 1 teaspoon apple cider vinegar, 1/2 teaspoon garlic powder, and 1/2 teaspoon salt, then whisk together to create the dressing.
In a large bowl, combine the roasted sweet potato, cooked 1 cup quinoa, 1/2 cup cherry tomatoes, 1/2 small red onion, 1/2 cup corn, and 1/4 cup cilantro. Pour the dressing over the salad and toss to combine.
Add to serving bowls, sprinkle with 1/3 cup feta cheese, and add lime wedges if desired.