FINDING: In most Mexican groceries, in many general groceries with regular bottled herbs (the bottles may be labeled only “oregano”; fine print may reveal its Mexican origin), and via the internet.

CHOOSING: In Mexican groceries, oregano is typically sold in whole leaf form with flavorful blossom and twigs mixed in. Though its twigginess is a disadvantage, this oregano typically has the freshest, fullest flavor.

STORING: In a cool, dark, dry place, well sealed, for up to 3 months.