Steps to making Curd; Zest your lemons/oranges, squeeze juice. In a double boiler add butter, sugar, juice and zest. Add eggs and cook for 20 minutes. Put in jars and place in a water bath canner and can for 15 minutes.
Ladle into jars, clean off the tops,
Place lids on clean tops
place rings on jars, not to tight now
place in water bath canner
make sure you have at least 1 1/2 inches of water above your jars