Roughly chop your chillies and place in a blender or food processor.Peel and add the garlic.Add the salt and sugar and blend/chop everything to a semi coarse state.
Pour your fermented chilli mixture back into a blender. Add the vinegar and blend until you get a smooth purée.
Strain this purée through a medium mesh strainer straight into a small saucepan. You don't want a strainer that's too fine as you'll be missing out on all the flavour from out processed chillies and garlic.Push down hard on the pulp to extract as much flavour out of it as possible.
Place the saucepan over medium heat and bring to a simmer. Once simmering, reduce heat to low and simmer for 5 minutes.Taste it after 2 minutes and add more salt, sugar or vinegar to your taste. You want hot, sour, salty and a touch sweet.
Pour into your sterilised glass bottle or jar, cover and leave on the kitchen counter until cool. Then store in the fridge and use within 6 months.Click here for how to sterilise jars and bottles.