Add all the ingredients to a large mixing bowl and mix until very well combined, then gently pound or massage your herbs to bruise them a little and get some moisture out. You don’t want to completely destroy them, just get them to release a little bit of their water.
Transfer your herbs to an airtight container with fitting lid and refrigerate. Give them a good stir every day for the next 7 days, then store in the refrigerator in Mason type glass jars for up to 6 months.