Preheat your oven to 400°F (200°C). Line a baking sheet with parchment paper.
- Toss the diced sweet potatoes with 1 tablespoon of olive oil and a pinch of salt and pepper. Spread them evenly on the baking sheet.
- Roast the sweet potatoes for 25-30 minutes, flipping halfway through, until they are tender and slightly browned.
- While the sweet potatoes roast, massage the chopped kale with a little olive oil and a pinch of salt to soften the leaves.
- In a small bowl, whisk together the dressing ingredients: olive oil, balsamic vinegar, Dijon mustard, honey, salt, and pepper.
- Once the sweet potatoes are done, let them cool slightly. In a large bowl, combine the roasted sweet potatoes, kale, red onion (if using), and any optional toppings (nuts and cheese).
- Drizzle the dressing over the salad and toss gently to combine.
- Serve immediately and enjoy!