
Prepare the quince. Cut each fruit into slices. Remove the seeds, leave the skin on.

Cook the jelly. Pour water into a saucepan so that it barely covers the quince, put it on the fire and cook until it becomes soft. Strain the liquid through cheesecloth folded in several layers. Pour in sugar and thyme, bring the syrup to a boil and cook until the desired consistency. At the end of cooking, add a little citric acid. Remove the thyme, and pour the jelly into jars and close with lids. When the jelly has cooled, put it in the refrigerator.