Quince-Lemon Marmalade

The very first marmalade was made from quince, perhaps because it contains a large amount of pectin. A hint of vanilla softens the sharp taste of this version. Thanks to its magnificent color and delicious taste, this marmalade will be a great gift.
Put the quince and lemon in a food processor; chop 10 times or until they are finely chopped. Combine the quince mixture, sugar, water, and vanilla in a large, heavy saucepan. Bring to a boil; reduce heat and simmer 55 minutes or until reduced to about 3 1/2 cups. Cool; pour into an airtight container.Note: Keep the marmalade in the refrigerator in an airtight container for up to two months.