Cut the chillies up into 3-4 pieces and place in your mortar.
Add the salt and grind up the chillies with the pestle, or pound down, whatever is easiest. Stop at the semi coarse stage or when your arm and shoulder get tired!
Stir in the vinegar and transfer to a small jar and keep in the fridge for up to a week.
In a Food Processor
Cut the chillies up into 3-4 pieces and place in your food processor.
Add the salt and vinegar and pulse to a semi coarse stage. You could grind the chillies up finer if you prefer.
Transfer to a small jar and keep in the fridge for up to a week.