Begin by slicing the red onions into thin rings.
In a pot, mix together the water, white vinegar, sugar, salt, dried parsley, and minced garlic.
Heat the mixture until it reaches a boil, ensuring that the sugar and salt fully dissolve.
Once boiling, pour the hot mixture over the sliced onions in a jar or container.
Seal the container and allow it to sit at room temperature for about 30 minutes.
After 30 minutes, transfer the container to the refrigerator.
