Preheat your oven or air fryer to 400°F. Peel the sweet potatoes and finely dice them. I use my vegetable chopper for even cuts.
Roast.
Toss the cubes in olive oil, salt, and pepper. Once coated, place them in the air fryer for 14–18 minutes, stirring occasionally until golden and fork-tender. If roasting in the oven, cook for about 30 minutes.
Cook the pasta.
Boil the bow tie noodles 1–2 minutes less than the package directions in salted water so they’re al dente. Drain but don’t rinse. This helps the dressing cling better.
Combine.
Add the warm noodles to a large mixing bowl and fold in the spinach right away to help wilt it slightly.