Zucchini Ginger Jam

1 1/4 lb. zucchini (4 medium size)
1 1/4 lb sugar (3 cups)
1 tsp strained lemon juice
1/2" peeled ginger

Peel zucchini, put all of the ingredients in a food processor and zizz until there are no big lumps left. Heat the mixture gently in a large saucepan until all the sugar has dissolved. Then boil until setting point or until a temperature of 220 F has been reached. Put into warmed jam jars.