Pour in the rice vinegar and extra virgin olive oil and stir well until everything is combined. Stir in the sea salt and adjust the amount to your personal taste.
As an alternative to whisking everything in a small bowl, you can add the ingredients to a small food processor or a blender and blend until the sauce reaches your desired consistency.
Use immediately as a marinade or a sauce for any cut of steak, chicken, pork, or fish, or store in an airtight container in the refrigerator for up to one week.