Preheat the oven to 400°F (200°C).
Spread orange segments on a baking tray and drizzle with olive oil.
Roast oranges for 10-15 minutes until caramelized.
While the oranges roast, place prosciutto on another baking sheet and bake for 10 minutes.
Prepare the dressing by whisking together olive oil, balsamic vinegar, salt, and pepper.
In a large bowl, combine chopped kale and dressing, tossing to coat.
Add the roasted oranges, crispy prosciutto, toasted walnuts, and feta on top of the kale.
Gently toss to combine the ingredients before serving.