INGREDIENTS
3/4 lb
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guanciale
or pancetta, thinly sliced
3
garlic cloves
1
red onion, halved and sliced 1/2 inch thick
1 1/2 tsp
hot red pepper flakes
Kosher salt and freshly ground black pepper
1 1/2 cups
basic tomato sauce
1 lb
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bucatini
1
bunch of flat-leaf parsley, leaves only
Pecorino Romano, for grating