Step 1

Melt butter in a heavy pot or Dutch oven over medium heat

Step 2

Add onions, season with salt and pepper and bay, then soften but do not brown for 6 to 7 minutes

Step 3

Add wine and stock and simmer 15 minutes

Step 4

Discard the bay leaf and purée in a blender or food processor

Step 5

Heat water to boil for pasta

Step 6

Meanwhile, heat a large skillet over medium heat with EVOO, a turn of the pan, and render the pancetta or bacon for 3 minutes

Step 7

Add garlic and stir, add the onion purée, cream and nutmeg and cook to reduce and thicken, 10 to 12 minutes more

Step 8

Listicle: Rachael Ray 14-Inch Frying Pan with Helper Handle Cook pasta in salted water, reserve ½ cup starchy water and drain

Step 9

Add cheese to the sauce, then toss with the bucatini and adjust seasoning