Spare Spoons Kitchen
A long, lazy simmer from a short list: red onion melted in olive oil, a whole chub of 'nduja dissolved into it, a bottle of passata, and mezzi rigatoni to catch the sauce in every tube. Torn basil at the end, sharp pecorino over the top.
Get these into the state the recipe asks for first — the steps that use them won't wait.
How hot is your 'nduja? Tempesta's turned out milder than I expected — a gentle warmth rather than a kick. 'Nduja varies a lot by maker; if yours is a fiercer one, start with about two-thirds of the chub and stir in more at the end if the sauce can take it. Whatever the brand, it's cured pork and Calabrian chili whipped into a spreadable paste, and it melts into oil the way butter does.
Want it hotter, and still Calabrian? Add more of the same chili, not a different one. Stir a spoonful of Tutto Calabria Crushed Calabrian Chili Peppers (10-oz jar, in oil — Whole Foods, Italian delis, Amazon) in with the 'nduja so it melts into the fat the same way: 1 tsp is noticeable, 1 tbsp is serious. Dried Calabrian peperoncino flakes bloomed in the oil with the onion do the same job.
The oil isn't a mistake. Half a cup sounds like a lot for one onion, but it's the body of the sauce — the 'nduja's own fat joins it, and the passata's acidity balances it out. Don't cut it back.
Pecorino, with or without peppercorns. The night I made this, the only pecorino in the house was a Pecorino Pepato — a Sicilian-style pecorino studded with whole black peppercorns (pepato just means "peppered") — and it was excellent here. Plain Pecorino Romano is the everyday pick; either way, grate it fine so it melts into the sauce rather than sitting on top.
Why mezzi rigatoni? Short, ridged, hollow — the sauce gets inside the tubes as well as on them, which is the whole pleasure of this dish. Rigatoni, paccheri, or penne rigate all work; smooth shapes won't hold it as well.
Make-ahead: the sauce keeps 4 days in the fridge and freezes well. It thickens as it sits — loosen with pasta water when you reheat.
Gluten-free: use a gluten-free ridged short pasta — Barilla makes a GF penne rigate that holds sauce well. Save the cooking water as usual.
No pecorino: Parmesan is milder and less salty; you may want a touch more salt in the sauce.
Can't find 'nduja: there's no true stand-in for the melt-away texture, but 115 g (4 oz) of hot Italian sausage, casing removed and broken up fine, plus 1 tsp Calabrian chili paste, gets you a cousin of this sauce.