Pickled onions and jalapeños from The Best Mexican Recipes: Kitchen-Tested Recipes That Put the Real Flavors of Mexico Within Reach (page 213) by America's Test Kitchen Editors

• jalapeño chiles
• distilled vinegar
  "Distilled vinegar, also known as virgin vinegar, can be made from just about any vinegar – for instance: rice, malt, wine, fruit, balsamic, apple cider, kiwifruit, rice, coconut, palm, cane, raisin, date, beer, honey, kombucha, and much more. As its name suggests, this vinegar is distilled from ethanol. ‘Distilled’ plainly means that the liquid component is separated from the base mixture. This produces a colorless solution with 5-8% acetic acid in the water – relatively weaker than white or spirit vinegar." http://www.differencebetween.net/object/comparisons-of-food-items/difference-between-white-and-distilled-vinegar/
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Where’s the full recipe - why can I only see the ingredients?