If you like the crunch and pungent flavor of raw red onions but not their tongue-tingling bite, give this a try!
Peel and slice the red onion as called for in your recipe, then soak them in a bowl of ice water. Let them sit for at least ten minutes, stirring them once or twice, before draining and using them in your recipe.
Soaking red onion in ice water tames the bite and mellows out the flavor. The sulfur compounds responsible for that biting sensation leach into the water from the cut surfaces.
For added flavor, you can also soak the onions in lime juice, lemon juice, or vinegar. This method also works for other onions and bitter melon.
Give it a try!