Deflame the Onions
Place your diced red onions into a mixing bowl. Pour the fresh lime juice and a half-teaspoon of salt over them. Toss thoroughly and set aside at room temperature.
The acid in the lime juice and the osmotic pressure of the salt draw out the harsh, burning sulfurous compounds of the raw onion.
The onions will soften slightly and turn a vibrant pinkish-red hue, losing their sharp, eye-watering aroma.