01 -
Once your pasta and onions have cooled, toss both into the big bowl with your dressing. Hold back a little onion for topping later. Coat everything gently. Taste and fix the seasoning if you want.
02 -
Whisk sour cream, mayo, that vinegar, soy, chopped parsley, and chives in a large bowl till smooth. Want it thinner? Splash in the cooled pasta water a bit at a time till it’s just right.
03 -
Boil up a big pot of salted water. Toss in farfalle pasta. Cook until it’s just right—check your box. Save a bit of the cooking water, then drain. Let pasta cool fully.
04 -
Pour the olive oil into a skillet on low. Drop in onions and that pinch of salt. Give it a stir every few minutes so they get sweet and golden—takes around 45 minutes. Last minute, mix in the garlic and let it get fragrant.
05 -
Scatter leftover onions, more fresh parsley, and a few cracks of pepper on top. Serve cold or let it come up to room temp. Got leftovers? Fridge them for a couple of days.