Pesto di Basilico
The basic basil pesto
Basil, pine nuts, garlic, two cheeses, and good olive oil, worked into a rough green paste. Ligurian by birth, not ours — but it earned its place on our table long ago, and it does far more than dress pasta.
Let me be honest about provenance first: pesto is from Genoa, not Campania. Nobody's Neapolitan grandmother invented it. But like a few other adopted dishes on this blog, it settled into our kitchen and stayed — a jar in the fridge in summer, when basil is everywhere and cooking feels optional.
This page is for the sauce itself, because pesto is not only a pasta dressing. Spread it on crostini or warm bruschetta. Spoon it over boiled potatoes and green beans. Stir a spoonful into a minestrone off the heat. Drop a little on grilled zucchini or a mozzarella and tomato plate. For the pasta version — with the Ligurian trick of potatoes and green beans in the pot — see pasta al pesto.
Basil leaves are rich in polyphenol oxidase, the same enzyme that browns a cut apple. The moment the leaves are torn or crushed, the enzyme meets its substrates and oxygen, and the bright green begins sliding toward olive-brown. Heat accelerates it dramatically — which is why pesto is never cooked, and why a metal blade spinning fast (and warming the paste) darkens pesto faster than a mortar's slow pounding.
The defenses are simple: work cold (some cooks chill the blender jar), work fast, and cover the finished surface with a film of olive oil to keep oxygen out. Blanching the basil for a few seconds deactivates the enzyme entirely — restaurant pesto stays neon green that way — at a small cost in fresh-basil perfume.
The recipe
Makes about a cup — enough to dress pasta for four, or to keep in a jar in the fridge for the week.
Related
Buon appetito.
