Wash and chop the cauliflower, carrots, celery, and bell peppers into bite-sized pieces.
In a large bowl, dissolve the salt in water and add the chopped vegetables. Let them soak overnight in the refrigerator.
Drain the vegetables and rinse them well under cold water.
In a saucepan, bring the white vinegar to a boil, then pour it over the drained vegetables. Let them sit for 15 minutes.
Finely chop the garlic and mix it with the vegetables, along with oregano and red chili flakes.
Transfer the mixture into sterilized jars, and top with olive oil, ensuring the vegetables are fully submerged.
Seal the jars and refrigerate for at least 3 days before serving. The flavors will meld and intensify over time.
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