Linked from
The 7 pages that link to Pesto, each with the reason it gives.
GenoaBroader topic: Genoa is the best-known home of pesto alla genovese.
BasilRelated: Basil is the defining herb in the best-known version of this Ligurian sauce.
Pine nutRelated: Pine nuts add richness and texture to the best-known form of this sauce.
Pinus pineaBroader topic: Stone pine nuts can provide the seeds used in this well-known preparation.
Sun-dried tomatoRelated: Dried tomatoes can add sweetness and acidity to variations on this sauce.