Pasta Alla Gricia

There is an important and splendid group of pasta recipes that is associated with Rome and the area around it; all the variations begin with bits of cured meat cooked until crisp. Around these delightfully crispy bits—and, of course, their rendered fat—are built a number of different sauces of increasing complexity. The first contains no more than meat and grated cheese and is called pasta alla gricia; the second, in which eggs are added, is the well-known pasta (usually spaghetti) carbonara, one of the first authentic non-tomato sauces to become popular in the United States, about thirty years ago; and the third is pasta all’Amatriciana, which adds the sweetness of cooked onion and the acidity of tomato.