This bright, jewel-toned condiment offers a zesty tang to countless dishes and adds a lovely splash of color as well. It takes about 10 minutes to assemble and lasts for weeks in the refrigerator.

1 medium red onion, about 5 ounces
1/2 teaspoon sugar
1/2 teaspoon salt
3/4 cup rice vinegar, white vinegar, or apple cider vinegar

• In the container you will be using to store the onions, add the sugar, salt, vinegar, and flavorings. Stir to dissolve.
• Boil 2 or 3 cups of water in a kettle. Par-blanch the onions: Place the onions in the sieve and place the sieve in the sink. Slowly pour the boiling water over the onions and let them drain.