Kitchen Tip : On electric stovetops, use flat-bottomed pans that make full contact with the element. A warped or rounded pan may be a conversation piece, but will waste most of the heat.
Kitchen Tip : Use a covered kettle or pan to boil water; it's faster and it uses less energy.
Wash quinces. Remove stems and blossom ends. Chop with coarse knife of food chopper. Combine with stemmed cranberries which have been washed. Add water. Cook until fruit is soft. Pour into jelly bag and drain overnight.
Empty juice into large saucepan. Boil hard 20 minutes. Measure and add an equal amount of sugar. Boil rapidly until jelly sheets from spoon.