Step 1: Slice and Pack Carefully slice your washed jalapeño peppers into even rings. Pack the raw pepper slices tightly into a clean quart-sized mason jar (or two pint jars), letting them fill the container evenly up to the neck.
Step 2: Boil the Pickling Brine In a small saucepan, combine the white vinegar, water, smashed garlic clove, honey (or sugar), salt, Mexican oregano, black peppercorns, and the bay leaf. Place over medium-high heat and bring the brine mixture to a quick, roaring boil.
Step 3: Cool and Pour Give the boiling brine a brief stir to ensure the salt and honey are completely dissolved, then immediately remove the saucepan from the heat source. Let it cool slightly for a minute, remove and discard the bay leaf, then carefully pour the hot liquid directly over the jalapeños in the jar, ensuring all the pepper rings are completely submerged.
Step 4: Seal and Chill Secure the jar tightly with its lid and cover. Let the jar sit undisturbed on the kitchen counter until it cools completely to room temperature. Once cooled, slide it into the refrigerator.