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 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 to fully cover the vegetables.
Seal the jars and let them sit in the refrigerator for at least 3 days before consuming. The flavor will intensify over time.
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