Pesto alla Genovese

Pesto means pounded. Not processed, not blended, not buzzed in a machine that heats the basil and turns it bitter within seconds. The mortar and pestle exists for a reason. When you crush basil leaves against stone with a wooden pestle, you bruise the cells and release their oils gently. When you spin them in a blade, you shred them, generate heat through friction, and oxidize the chlorophyll before it reaches the bowl. The color tells the truth: hand-pounded pesto stays bright. Machine pesto turns army green.

The Genovesi are particular about their pesto, and they have earned the right. The basil of Prà, a small district west of Genoa, grows in the salt air of the Ligurian coast and produces leaves so tender and fragrant that other basils taste coarse by comparison. You may not have access to this basil. Use the youngest, smallest leaves you can find, preferably grown in poor soil. Rich soil makes big, tough leaves with less flavor.

I will tell you now that this takes time. Fifteen minutes at the mortar, perhaps twenty. Your arm will tire. This is the price of doing things properly. If you are not willing to pay it, you are not ready for pesto alla Genovese.