Vinagreta de Naranja Agria

This is from Yucatan. Not from a general Mexican pantry, from Yucatan specifically, where naranja agria is the acid of the kitchen the way lime is the acid of the rest of the country. The sour orange grows in patios across the Peninsula, brought by the Spanish in the 16th century and adopted so thoroughly by Mayan cooks that today no one in Merida thinks of it as a foreign fruit. It is the citrus of cochinita pibil, of the recados, of escabeche, and of this little vinaigrette that sits on the table in a small talavera bowl and gets spooned over whatever needs brightening.

The technique is not complicated. Char the garlic on the comal until the skin blackens. Toast the oregano yucateco for fifteen seconds until it perfumes. Juice the naranja agria. Whisk it all together with good olive oil and salt. That is the whole recipe. What matters is that you use the right oregano, the Yucatecan one with the bigger leaves and the menthol note, not the Mediterranean kind that goes on pizza, and that you do not skip the char on the garlic. Raw garlic gives you a sharp dressing. Charred garlic gives you a Yucatecan one.

A senora in a Valladolid kitchen showed me how she keeps a small jar of this vinaigrette in the cabinet, not the fridge, with a habanero floating in it for perfume. She said it lasts a week and gets better every day. I have made it that way ever since. Cada estado, su propia cocina, and this little bowl belongs to the Peninsula.