Earthy, woodsy herbs and salty pancetta, both crisped in rendered pancetta fat, infuse this simple spaghetti dish with savory depth. Parmesan cheese adds nutty, umami notes and red pepper flakes add a kick of heat, rounding everything out. Orange is a surprise ingredient in the dish. We love the muted sweetness and acidity of orange zest and juice, which nicely balance the richness of the cheese and pork. Lemon is a fine substitute.
Don’t use pre-sliced pancetta; ¼-inch cubes—packaged or hand cut—are ideal for texture and even distribution throughout the dish. Sliced pancetta will taste fine, but it browns less evenly and may clump when stirred into the pasta.