Kumquats are tiny citrus fruits that taste great when preserved. One good reason why you should preserve them is because kumquats don’t have a long shelf life. To preserve the kumquats, you want to scrub a pound of them with liquid soap and water before rinsing them off with water. After you do this, you would boil the kumquats in a large pot of hot water for fifteen to twenty minutes then add a pound of sugar to the water and kumquats and let simmer over medium heat for 20 minutes. Finally, you would place the kumquats in jars then put lids over the jars.