Wash, and cut your Guavas and place on a trivet in a pressure cooker

Cook for 2 - 5 mins depending on the ripeness

Remove and add to a blender and blend

Strain the mixture and measure

Add the paste to a pot and add equal quantities in cups of sugar and allow the sugar to melt

Add the lime juice

Add the optional chilli powder

Cook this for about 17 mins

Add the butter

Remove and pour into a greased dish and allow to set

Once set, cut and remove and store in an airtight container