Put the sea salt into a bowl. Zest the orange straight onto the salt.
Rinse the herbs if necessary and dry on kitchen paper. Strip the leaves from the herbs and chop very finely. Add to the salt and orange zest and mix thoroughly. Alternatively, all the mix can be blitzed in a food processor without chopping.
Put a sheet of silicon paper onto a tray. Spread the mixture evenly over the paper and leave overnight to air dry.
The next day, wash and rinse your jar/s and put into a warm oven (50°C-100°C) upside down to dry and sterilise for about 15 minutes. Then spoon the herby salt mixture into the jars and label.
Cook's tip: You can make flavoured salts with any herbs you have to hand. Dried chilli works well too!