Pasta with Caramelized Sweet Potatoes and Kale

Bahan-bahan (6 porsi)

• 12 ounces uncooked pasta (I used orecchiette)
• 4 tablespoons butter or olive oil, divided
• 1 pound sweet potatoes, peeled and cut into 1/2-inch cubes
• Kosher salt and freshly-cracked black pepper
• half a medium red onion, sliced
• 5 g arlic cloves, peeled and thinly sliced
• 2 cups roughly-chopped kale leaves, tough stems removed
• 1/4 cup dry white wine (or chicken or vegetable stock)
• 2 tablespoons white balsamic vinegar (or traditional balsamic vinegar*)
• 1/2 cup toasted pine nuts
• toppings: lots and lots of freshly-grated parmesan, chopped fresh basil (optional), diced cooked bacon (optional)