1kg white crystal sugar
3 cups water
Juice of ½ lemon
Using a toothpick prick the fruit many times. Fill a pot with water and add the washed kumquats. Let boil for 10-12 minutes then sieve and put fresh water in the pot. When it starts boiling put the fruit in the pot and boil again. Repeat this procedure 3-4 times. Strain the boiled kumquats and put aside. In a large pot boil the sugar with water for 10-15 minutes and then add the kumquats. Boil together for another 15 minutes while skimming the surface and making sure not to boil over. If necessary lower the fire.
Remove the pot from the fire and leave out covered for 24 hours. The next day, if the syrup has not thickened, which is not unusual, boil again for 5-10 minutes. Add the juice, stir well and store in sterilised jars.