If you don't have lots of limes, you can use lemon juice or just about any variety of vinegar including distilled white vinegar, red wine vinegar, white wine vinegar, apple cider vinegar, or rice vinegar, which will give a milder flavor, in place of the lime juice. You can even use a combination of vinegars. The flavor will be different, but still delish!u003cbr/u003eu003cbr/u003eI wouldn't recommend substituting orange juice or Meyer lemon juice as these don't have enough acid to properly pickle the onions.